diff --git a/src/MCStudies/GenericFlux_Vectors.cxx b/src/MCStudies/GenericFlux_Vectors.cxx
index 94d6d42..69f2074 100644
--- a/src/MCStudies/GenericFlux_Vectors.cxx
+++ b/src/MCStudies/GenericFlux_Vectors.cxx
@@ -1,239 +1,248 @@
 // Copyright 2016 L. Pickering, P Stowell, R. Terri, C. Wilkinson, C. Wret
 
 /*******************************************************************************
 *    This file is part of NUISANCE.
 *
 *    NUISANCE is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    NUISANCE is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with NUISANCE.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
 
 #include "GenericFlux_Vectors.h"
 
 GenericFlux_Vectors::GenericFlux_Vectors(std::string name, std::string inputfile,
                                        FitWeight *rw, std::string type,
                                        std::string fakeDataFile) {
   // Measurement Details
   fName = name;
   eventVariables = NULL;
 
   // Define our energy range for flux calcs
   EnuMin = 0.;
   EnuMax = 100.;  // Arbritrarily high energy limit
 
+  if(Config::HasPar("EnuMin")){
+    EnuMin = Config::GetParD("EnuMin");
+  }
+
+  if(Config::HasPar("EnuMax")){
+    EnuMax = Config::GetParD("EnuMax");
+  }
+
   // Set default fitter flags
   fIsDiag = true;
   fIsShape = false;
   fIsRawEvents = false;
 
   // This function will sort out the input files automatically and parse all the
   // inputs,flags,etc.
   // There may be complex cases where you have to do this by hand, but usually
   // this will do.
   Measurement1D::SetupMeasurement(inputfile, type, rw, fakeDataFile);
 
   eventVariables = NULL;
 
   // Setup fDataHist as a placeholder
   this->fDataHist = new TH1D(("empty_data"), ("empty-data"), 1, 0, 1);
   this->SetupDefaultHist();
   fFullCovar = StatUtils::MakeDiagonalCovarMatrix(fDataHist);
   covar = StatUtils::GetInvert(fFullCovar);
 
   // 1. The generator is organised in SetupMeasurement so it gives the
   // cross-section in "per nucleon" units.
   //    So some extra scaling for a specific measurement may be required. For
   //    Example to get a "per neutron" measurement on carbon
   //    which we do here, we have to multiple by the number of nucleons 12 and
   //    divide by the number of neutrons 6.
-  fScaleFactor =
-      (GetEventHistogram()->Integral("width") * 1E-38 / (fNEvents + 0.)) /
+  this->fScaleFactor =
+      (this->PredictedEventRate("width") * 1E-38 / (fNEvents + 0.)) /
       this->TotalIntegratedFlux();
 
+
   LOG(SAM) << " Generic Flux Scaling Factor = " << fScaleFactor << std::endl;
 
   if (fScaleFactor <= 0.0) {
     ERR(WRN) << "SCALE FACTOR TOO LOW " << std::endl;
   }
 
   // Setup our TTrees
   this->AddEventVariablesToTree();
 }
 
 void GenericFlux_Vectors::AddEventVariablesToTree() {
   // Setup the TTree to save everything
   if (!eventVariables) {
     Config::Get().out->cd();
     eventVariables = new TTree((this->fName + "_VARS").c_str(),
                                (this->fName + "_VARS").c_str());
   }
 
   LOG(SAM) << "Adding Event Variables" << std::endl;
 
   eventVariables->Branch("Mode",   &Mode,   "Mode/I"  );
   eventVariables->Branch("cc",     &cc,     "cc/B"    );
   eventVariables->Branch("PDGnu",  &PDGnu,  "PDGnu/I" );
   eventVariables->Branch("Enu_true",    &Enu_true,    "Enu_true/F" );
   eventVariables->Branch("tgt",    &tgt,    "tgt/I"   );
   eventVariables->Branch("PDGLep", &PDGLep, "PDGLep/I");
   eventVariables->Branch("ELep",   &ELep,   "ELep/F"  );
   eventVariables->Branch("CosLep", &CosLep, "CosLep/F");
 
   // Basic interaction kinematics
   eventVariables->Branch("Q2",     &Q2,     "Q2/F");
   eventVariables->Branch("q0",     &q0,     "q0/F");
   eventVariables->Branch("q3",     &q3,     "q3/F");
   eventVariables->Branch("Enu_QE", &Enu_QE, "Enu_QE/F");
   eventVariables->Branch("Q2_QE",  &Q2_QE,  "Q2_QE/F");
   eventVariables->Branch("W_nuc_rest", &W_nuc_rest, "W_nuc_rest/F");
   eventVariables->Branch("W", 	   &W, 	    "W/F");
   eventVariables->Branch("x", 	   &x, 	    "x/F");
   eventVariables->Branch("y", 	   &y, 	    "y/F");
 
   // Save outgoing particle vectors
   eventVariables->Branch("nfsp", &nfsp, "nfsp/I");
   eventVariables->Branch("px",   px,    "px[nfsp]/F");
   eventVariables->Branch("py",   py,    "py[nfsp]/F");
   eventVariables->Branch("pz",   pz,    "pz[nfsp]/F");
   eventVariables->Branch("E",    E,     "E[nfsp]/F");
   eventVariables->Branch("pdg",  pdg,   "pdg[nfsp]/I");
 
   // Event Scaling Information
   eventVariables->Branch("Weight", &Weight, "Weight/F");
   eventVariables->Branch("InputWeight", &InputWeight, "InputWeight/F");
   eventVariables->Branch("RWWeight", &RWWeight, "RWWeight/F");
   eventVariables->Branch("fScaleFactor", &fScaleFactor, "fScaleFactor/F");
 
   return;
 }
 
 
 void GenericFlux_Vectors::FillEventVariables(FitEvent *event) {
 
   // Reset all Function used to extract any variables of interest to the event
   Mode = PDGnu = tgt = PDGLep = 0;
 
   Enu_true = ELep = CosLep = Q2 = q0 = q3 = Enu_QE = Q2_QE = W_nuc_rest = W = x = y = -999.9;
 
   nfsp = 0;
   for (int i = 0; i < kMAX; ++i){
     px[i] = py[i] = pz[i] = E[i] = -999;
     pdg[i] = 0;
   }
 
   Weight = InputWeight = RWWeight = 0;
 
   partList.clear();
 
   // Now fill the information
   Mode = event->Mode;
   cc = (abs(event->Mode) < 30);
 
   // Get the incoming neutrino and outgoing lepton
   FitParticle *nu  = event->GetNeutrinoIn();
   FitParticle *lep = event->GetHMFSAnyLepton();
 
   PDGnu = nu->fPID;
   Enu_true = nu->fP.E()/1E3;
   tgt = event->fTargetPDG;
   if (lep != NULL) {
     PDGLep = lep->fPID;
     ELep = lep->fP.E()/1E3;
     CosLep = cos(nu->fP.Vect().Angle(lep->fP.Vect()));
 
     // Basic interaction kinematics
     Q2 = -1*(nu->fP - lep->fP).Mag2()/1E6;
     q0 = (nu->fP - lep->fP).E()/1E3;
     q3 = (nu->fP - lep->fP).Vect().Mag()/1E3;
 
     // These assume C12 binding from MINERvA... not ideal
     Enu_QE = FitUtils::EnuQErec(lep->fP, CosLep, 34., true);
     Q2_QE  = FitUtils::Q2QErec(lep->fP, CosLep, 34., true);
 
     // Get W_true with assumption of initial state nucleon at rest
     float m_n = (float)PhysConst::mass_proton;
     W_nuc_rest = sqrt(-Q2 + 2 * m_n * q0 + m_n * m_n);
     W = sqrt(-Q2 + 2 * m_n * q0 + m_n * m_n);
     x = Q2/(2 * m_n * q0);
     y = 1 - ELep/Enu_true;
   }
 
   // Loop over the particles and store all the final state particles in a vector
   for (UInt_t i = 0; i < event->Npart(); ++i) {
 
     bool part_alive = event->PartInfo(i)->fIsAlive and event->PartInfo(i)->Status() == kFinalState;
     if (!part_alive) continue;
 
     partList .push_back(event->PartInfo(i));
   }
 
   // Save outgoing particle vectors
   nfsp = (int)partList.size();
 
   for (int i = 0; i < nfsp; ++i){
     px[i]  = partList[i]->fP.X()/1E3;
     py[i]  = partList[i]->fP.Y()/1E3;
     pz[i]  = partList[i]->fP.Z()/1E3;
     E[i]   = partList[i]->fP.E()/1E3;
     pdg[i] = partList[i]->fPID;
   }
 
   // Fill event weights
   Weight = event->RWWeight * event->InputWeight;
   RWWeight = event->RWWeight;
   InputWeight = event->InputWeight;
 
   // Fill the eventVariables Tree
   eventVariables->Fill();
   return;
 };
 
 void GenericFlux_Vectors::Write(std::string drawOpt) {
 
   // First save the TTree
   eventVariables->Write();
 
   // Save Flux and Event Histograms too
   GetInput()->GetFluxHistogram()->Write();
   GetInput()->GetEventHistogram()->Write();
 
   return;
 }
 
 
 // Override functions which aren't really necessary
 bool GenericFlux_Vectors::isSignal(FitEvent *event) {
   (void)event;
   return true;
 };
 
 void GenericFlux_Vectors::ScaleEvents() {
   return;
 }
 
 void GenericFlux_Vectors::ApplyNormScale(float norm) {
   this->fCurrentNorm = norm;
   return;
 }
 
 void GenericFlux_Vectors::FillHistograms() {
   return;
 }
 
 void GenericFlux_Vectors::ResetAll() {
   eventVariables->Reset();
   return;
 }
 
 float GenericFlux_Vectors::GetChi2() {
   return 0.0;
 }