diff --git a/Detectors/ITSMFT/ITS/simulation/src/Detector.cxx b/Detectors/ITSMFT/ITS/simulation/src/Detector.cxx
index d998f9a4b2ae7..3d55a0e610448 100644
--- a/Detectors/ITSMFT/ITS/simulation/src/Detector.cxx
+++ b/Detectors/ITSMFT/ITS/simulation/src/Detector.cxx
@@ -101,10 +101,10 @@ static void configITS(Detector* its)
     {2.24, 2.34, 2.67, 9., 16.42, 12}, // for each inner layer: rMin,rMid,rMax,NChip/Stave, phi0, nStaves
     {3.01, 3.15, 3.46, 9., 12.18, 16},
     {3.78, 3.93, 4.21, 9., 9.55, 20},
-    {-1, 19.6, -1, 4., 7.5, 24},   // for others: -, rMid, -, NMod/HStave, phi0, nStaves // 24 was 49
-    {-1, 24.55, -1, 4., 6., 30},   // 30 was 61
-    {-1, 34.34, -1, 7., 4.29, 42}, // 42 was 88
-    {-1, 39.30, -1, 7., 3.75, 48}  // 48 was 100
+    {-1, 19.45, -1, 4., 7.5, 24},  // for others: -, rMid, -, NMod/HStave, phi0, nStaves // 24 was 49
+    {-1, 24.40, -1, 4., 6., 30},   // 30 was 61
+    {-1, 34.24, -1, 7., 4.29, 42}, // 42 was 88
+    {-1, 39.20, -1, 7., 3.75, 48}  // 48 was 100
   };
   const int nChipsPerModule = 7;  // For OB: how many chips in a row
   const double zChipGap = 0.01;   // For OB: gap in Z between chips
@@ -117,7 +117,7 @@ static void configITS(Detector* its)
   its->setStaveModelOB(o2::its::Detector::kOBModel2);
 
   const int kNWrapVol = 3;
-  const double wrpRMin[kNWrapVol] = {2.1, 19.3, 33.32};
+  const double wrpRMin[kNWrapVol] = {2.1, 19.2, 33.32};
   const double wrpRMax[kNWrapVol] = {15.4, 29.14, 44.9};
   const double wrpZSpan[kNWrapVol] = {70., 93., 163.6};
 
diff --git a/Detectors/ITSMFT/ITS/simulation/src/V3Layer.cxx b/Detectors/ITSMFT/ITS/simulation/src/V3Layer.cxx
index 95ab80dc11274..beaa32f0663fc 100644
--- a/Detectors/ITSMFT/ITS/simulation/src/V3Layer.cxx
+++ b/Detectors/ITSMFT/ITS/simulation/src/V3Layer.cxx
@@ -54,8 +54,8 @@ const Int_t V3Layer::sIBNChipRows = 1;
 const Double_t V3Layer::sIBChipZGap = 150.0 * sMicron;
 
 const Double_t V3Layer::sIBModuleZLength = 27.12 * sCm;
-const Double_t V3Layer::sIBFPCWiderXPlus = 850.0 * sMicron;
-const Double_t V3Layer::sIBFPCWiderXNeg = 300.0 * sMicron;
+const Double_t V3Layer::sIBFPCWiderXPlus = 950.0 * sMicron;
+const Double_t V3Layer::sIBFPCWiderXNeg = 400.0 * sMicron;
 const Double_t V3Layer::sIBFlexCableAlThick = 25.0 * sMicron;
 const Double_t V3Layer::sIBFPCAlGNDWidth = (4.1 + 11.15) * sMm;
 const Double_t V3Layer::sIBFPCAlAnodeWidth1 = 13.0 * sMm;
@@ -571,12 +571,11 @@ Double_t V3Layer::createStaveInnerB(TGeoVolume* mother, const TGeoManager* mgr)
   // Build up the stave
   // Chips are rotated by 180deg around Y axis
   // in order to have the correct X and Z axis orientation
-  xpos = -xtot + (static_cast<TGeoBBox*>(chipVol->GetShape()))->GetDX() + sIBFPCWiderXNeg;
   ypos = ymod - mChipThickness;
 
   for (Int_t j = 0; j < sIBChipsPerRow; j++) {
     zpos = ztot - j * (2 * zchip + sIBChipZGap) - zchip;
-    mother->AddNode(chipVol, j, new TGeoCombiTrans(xpos, ypos, zpos, new TGeoRotation("", 0, 180, 180)));
+    mother->AddNode(chipVol, j, new TGeoCombiTrans(0, ypos, zpos, new TGeoRotation("", 0, 180, 180)));
     mHierarchy[kChip]++;
   }
   ytot = ymod;
@@ -584,8 +583,9 @@ Double_t V3Layer::createStaveInnerB(TGeoVolume* mother, const TGeoManager* mgr)
   // Place the FPC and glue
   if (mStaveModel == Detector::kIBModel4) {
     Double_t yvol = (static_cast<TGeoBBox*>(ibModule->GetShape()))->GetDY();
+    xpos = 0.5 * (xtot - xchip);
     ypos += (ymod + yvol);
-    mother->AddNode(ibModule, 1, new TGeoTranslation(0, ypos, 0));
+    mother->AddNode(ibModule, 1, new TGeoTranslation(xpos, ypos, 0));
     ytot += yvol;
   }