diff --git a/src/defaults/MatchboxMergingDefaults.in.in b/src/defaults/MatchboxMergingDefaults.in.in
--- a/src/defaults/MatchboxMergingDefaults.in.in
+++ b/src/defaults/MatchboxMergingDefaults.in.in
@@ -1,252 +1,236 @@
 ################################################################################
 #
 # Default setup for Matchbox matrix element generation.
 # You do not need to make any change in here; processes of
 # interest can be chosen in the standard input files.
 #
 ################################################################################
 
 
-################################################################################
-# Integration/sampling
-################################################################################
-
-cd /Herwig/Samplers
-
-set FlatBinSampler:InitialPoints 10000
-set Sampler:BinSampler FlatBinSampler
-set Sampler:AddUpSamplers Off
-set Sampler:GlobalMaximumWeight Off
-set Sampler:FlatSubprocesses Off
-set Sampler:MinSelection 0.000001
-set Sampler:AlmostUnweighted Off
-set Sampler:RunCombinationData Off
-set Sampler:WriteGridsOnFinish No
-set Sampler:MaxEnhancement 1.1
 
 ################################################################################
 # Setup the factory object for merging
 ################################################################################
 
 mkdir /Herwig/Merging
 cd /Herwig/Merging
 
 
 create Herwig::MergingFactory MergingFactory HwDipoleShower.so 
 
 do MergingFactory:StartParticleGroup p
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/b
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/bbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/c
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/cbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/s
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/sbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/d
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/dbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/u
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/ubar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/g
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup pbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/b
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/bbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/c
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/cbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/s
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/sbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/d
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/dbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/u
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/ubar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/g
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup j
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/b
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/bbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/c
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/cbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/s
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/sbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/d
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/dbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/u
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/ubar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/g
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup u
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/u
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup ubar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/ubar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup d
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/d
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup dbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/dbar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup s
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/s
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup sbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/sbar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup c
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/c
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup cbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/cbar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup b
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/b
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup bbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/bbar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup t
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/t
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup tbar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/tbar
 do MergingFactory:EndParticleGroup
 
 
 do MergingFactory:StartParticleGroup g
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/g
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup gamma
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/gamma
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup h0
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/h0
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup W+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/W+
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup W-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/W-
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup Z0
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/Z0
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup e+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e+
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup e-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e-
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup mu+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu+
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup mu-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu-
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup tau+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/tau+
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup tau-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/tau-
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup l
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu-
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup nu
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/nu_e
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/nu_mu
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/nu_ebar
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/nu_mubar
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup l+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e+
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu+
 do MergingFactory:EndParticleGroup
 
 do MergingFactory:StartParticleGroup l-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/e-
 insert MergingFactory:ParticleGroup 0 /Herwig/Particles/mu-
 do MergingFactory:EndParticleGroup
 
 ################################################################################
 # Setup amplitudes
 ################################################################################
 
 cd /Herwig/MatrixElements/Matchbox/Amplitudes/Builtin
 
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudellbarqqbar
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudellbarqqbarg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudellbarqqbargg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudellbarqqbarqqbar
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudelnuqqbar
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudelnuqqbarg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudelnuqqbargg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudelnuqqbarqqbar
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudehgg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudehggg
 insert /Herwig/Merging/MergingFactory:Amplitudes 0 Amplitudehqqbarg
 
 ################################################################################
 # Setup utilities for process generation
 ################################################################################
 
 cd /Herwig/MatrixElements/Matchbox
 cd Utility
 set /Herwig/Merging/MergingFactory:DiagramGenerator DiagramGenerator
 set /Herwig/Merging/MergingFactory:ProcessData ProcessData 
 
 ################################################################################
 # Setup phasespace generators
 ################################################################################
 
 cd /Herwig/MatrixElements/Matchbox
 cd Phasespace
 set /Herwig/Merging/MergingFactory:Phasespace TreePhasespace
 
 ################################################################################
 # Setup scale choices
 ################################################################################
 
 cd /Herwig/Merging
 
 create Herwig::Merger Merger
 create Herwig::MergingReweight MPreWeight HwDipoleShower.so
 insert MergingFactory:Preweighters 0  MPreWeight
 
 create Herwig::SimpleColourBasis  LargeNColourBasis
 set LargeNColourBasis:LargeN On
 set Merger:LargeNBasis LargeNColourBasis
 
 set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV
 
 cd /