diff --git a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
index f2ab57a..aaa4b52 100644
--- a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
+++ b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
@@ -23,18 +23,15 @@
 #include "edm4hep/TrackerHitPlaneCollection.h"
 
 #include "Gaudi/Accumulators/RootHistogram.h"
-#include "Gaudi/Histograming/Sink/Utils.h"
 
-#include "DD4hep/BitFieldCoder.h"
 #include "DD4hep/DD4hepUnits.h"
 #include "DD4hep/Detector.h"
+#include "DDSegmentation/BitFieldCoder.h"
 
-#include "TFile.h"
 #include "TMath.h"
 
 #include <fmt/format.h>
 #include <cmath>
-#include <random>
 
 DDPlanarDigi::DDPlanarDigi(const std::string& name, ISvcLocator* svcLoc)
     : MultiTransformer(name, svcLoc,
@@ -156,7 +153,7 @@ std::tuple<edm4hep::TrackerHitPlaneCollection, edm4hep::MCRecoTrackerAssociation
     // Smear time of the hit and apply the time window cut if needed
     double hitT = hit.getTime();
 
-    if (m_resTLayer.size() and m_resTLayer[0] > 0) {
+    if (m_resTLayer.size() && m_resTLayer[0] > 0) {
       float resT = m_resTLayer.size() > 1 ? m_resTLayer[layer] : m_resTLayer[0];
 
       double tSmear = resT > 0 ? m_engine.Gaus(0, resT) : 0;
@@ -312,22 +309,3 @@ std::tuple<edm4hep::TrackerHitPlaneCollection, edm4hep::MCRecoTrackerAssociation
 
   return std::make_tuple(std::move(trkhitVec), std::move(thsthcol));
 }
-
-StatusCode DDPlanarDigi::finalize() {
-  auto                     file  = TFile::Open(m_outputFileName.value().c_str(), "RECREATE");
-  std::vector<const char*> names = {"hu", "hv", "hT", "hitE", "hitsAccepted", "diffu", "diffv", "diffT", "hSize"};
-  auto                     it    = names.begin();
-  for (auto& h : m_histograms) {
-    std::string name = "";
-    // Name that will appear in the stats table
-    std::string    histName = *it;
-    nlohmann::json json     = *h;
-    auto [histo, dir] =
-        Gaudi::Histograming::Sink::jsonToRootHistogram<Gaudi::Histograming::Sink::Traits<false, TH1D, 1>>(
-            name, histName, json);
-    histo.Write(*it);
-    ++it;
-  }
-  file->Close();
-  return StatusCode::SUCCESS;
-}
diff --git a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.h b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.h
index 31aca7f..2fc327e 100644
--- a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.h
+++ b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.h
@@ -35,7 +35,6 @@
 
 #include "TRandom2.h"
 
-#include <random>
 #include <string>
 #include <vector>
 
@@ -78,7 +77,6 @@ struct DDPlanarDigi final
   DDPlanarDigi(const std::string& name, ISvcLocator* svcLoc);
 
   StatusCode initialize() override;
-  StatusCode finalize() override;
 
   std::tuple<edm4hep::TrackerHitPlaneCollection, edm4hep::MCRecoTrackerAssociationCollection> operator()(
       const edm4hep::SimTrackerHitCollection& simTrackerHits,
@@ -94,7 +92,7 @@ struct DDPlanarDigi final
   Gaudi::Property<std::vector<float>> m_resTLayer{
       this,
       "ResolutionT",
-      {0.004},
+      {-1},
       "Resolution in the direction of t; either one per layer or one for all layers. If the single entry is negative, "
       "disable time smearing. "};
   Gaudi::Property<bool>   m_forceHitsOntoSurface{this, "ForceHitsOntoSurface", false,
diff --git a/k4Reco/DDPlanarDigi/options/runDDPlanarDigi.py b/k4Reco/DDPlanarDigi/options/runDDPlanarDigi.py
index 75d58c6..2d2a3dd 100644
--- a/k4Reco/DDPlanarDigi/options/runDDPlanarDigi.py
+++ b/k4Reco/DDPlanarDigi/options/runDDPlanarDigi.py
@@ -22,6 +22,8 @@
 from Configurables import DDPlanarDigi
 from Configurables import GeoSvc
 from Configurables import UniqueIDGenSvc
+from Configurables import RootHistSvc
+from Configurables import Gaudi__Histograming__Sink__Root as RootHistoSink
 import os
 
 id_service = UniqueIDGenSvc("UniqueIDGenSvc")
@@ -50,9 +52,13 @@
 #     "EventHeader",
 # ]
 
+hps = RootHistSvc("HistogramPersistencySvc")
+root_hist_svc = RootHistoSink("RootHistoSink")
+root_hist_svc.FileName = "ddplanardigi_hist.root"
+
 ApplicationMgr(TopAlg=[digi],
                EvtSel="NONE",
                EvtMax=-1,
-               ExtSvc=[EventDataSvc("EventDataSvc")],
+               ExtSvc=[EventDataSvc("EventDataSvc"), root_hist_svc],
                OutputLevel=INFO,
                )