diff --git a/MakeVertex.C b/MakeVertex.C
index 2a1578b..47acd58 100755
--- a/MakeVertex.C
+++ b/MakeVertex.C
@@ -125,7 +125,7 @@ void MakeVertex::Begin(TTree * /*tree*/)
   }
 
   // Load PC Calibrations
-  std::ifstream inputFile("slope_intercept_results.dat");
+  std::ifstream inputFile("slope_intercept_results_27Al.dat");
   if (inputFile.is_open())
   {
     std::string line;
diff --git a/MatchAndPlotCentroids.C b/MatchAndPlotCentroids.C
index 333675d..c4bac8c 100644
--- a/MatchAndPlotCentroids.C
+++ b/MatchAndPlotCentroids.C
@@ -12,7 +12,8 @@
 
 void MatchAndPlotCentroids() {
     // Open the centroid data file
-    std::ifstream inputFile("centroids.txt");
+    std::ifstream inputFile("centroids_27Al.txt");
+    // std::ifstream inputFile("centroids_17F.txt");
     if (!inputFile.is_open()) {
         std::cerr << "Error: Could not open Centroids.txt" << std::endl;
         return;
@@ -42,13 +43,17 @@ void MatchAndPlotCentroids() {
 
     // Reference centroids from histogram 24
     const auto& referenceCentroids = centroidData[1];
-    std::ofstream outputFile("slope_intercept_results.txt");
+    std::ofstream outputFile("slope_intercept_results.dat");
     if (!outputFile.is_open()) {
         std::cerr << "Error: Could not open the output file for writing!" << std::endl;
         return;
     }
     outputFile << "Histogram Number\tSlope\tIntercept\n";
     // Loop through histograms 25 to 47
+
+    // 1. Create a SINGLE canvas BEFORE the loop
+    TCanvas *c1 = new TCanvas("c1", "Centroid Fit Viewer", 800, 600);
+
     for (int targetHist = 0; targetHist <= 23; targetHist++) {
         // Ensure the target histogram exists and matches in peak numbers
         if (centroidData.find(targetHist) == centroidData.end() || centroidData[targetHist].size() != referenceCentroids.size()) {
@@ -74,14 +79,15 @@ void MatchAndPlotCentroids() {
         }
 
         // Create a TGraph
-        TCanvas *c1 = new TCanvas(Form("c_centroid_1_vs_%d", targetHist), Form("Centroid 1 vs %d", targetHist), 800, 600);
-        TGraph *graph = new TGraph(xValues.size(), &xValues[0], &yValues[0]);
-        graph->SetTitle(Form("Centroid of Histogram  %d vs 1", targetHist));
+       TGraph *graph = new TGraph(xValues.size(), &xValues[0], &yValues[0]);
+        graph->SetTitle(Form("Centroid of Histogram %d vs 1", targetHist));
         graph->GetYaxis()->SetTitle("Centroid of Histogram 1");
         graph->GetXaxis()->SetTitle(Form("Centroid of Histogram %d", targetHist));
-        graph->SetMarkerStyle(20); // Full circle marker
+        graph->SetMarkerStyle(20); 
         graph->SetMarkerSize(1.0);
         graph->SetMarkerColor(kBlue);
+        
+        graph->Draw("AP");
         // Draw the graph
         graph->Draw("AP");
         double minX = *std::min_element(xValues.begin(), xValues.end());
diff --git a/anasen_fem/scalars.dat.names b/anasen_fem/scalars.dat.names
index 947f957..d1fd517 100755
--- a/anasen_fem/scalars.dat.names
+++ b/anasen_fem/scalars.dat.names
@@ -2,7 +2,7 @@ Metadata for SaveScalars file: ./scalars.dat
 Elmer version: 26.1
 Elmer compilation date: 2026-03-15
 Solver input file: wires2d.sif
-File started at: 2026/03/23 17:44:06
+File started at: 2026/03/23 20:55:05
  
 Variables in columns of matrix: 
    1: res: potential difference
diff --git a/centroids.txt b/centroids.txt
deleted file mode 100644
index 1544379..0000000
--- a/centroids.txt
+++ /dev/null
@@ -1,97 +0,0 @@
-HistogramIndex	PeakNumber	Centroid	Amplitude	Sigma
-0	1	991.118
-0	2	2026.83
-0	3	3060.26
-0	4	4092.45
-1	1	922.213
-1	2	1885.55
-1	3	2845.53
-1	4	3810.32
-2	1	955.591
-2	2	1953.17
-2	3	2949.37
-2	4	3950.79
-3	1	995.787
-3	2	2036.58
-3	3	3076.91
-3	4	4112.05
-4	1	1017.48
-4	2	2080.19
-4	3	3142.24
-4	4	4206.1
-5	1	1022.78
-5	2	2091.21
-5	3	3158.28
-5	4	4226.97
-6	1	1076.22
-6	2	2203.37
-6	3	3329.53
-6	4	4457.69
-7	1	977.46
-7	2	1998.02
-7	3	3017.36
-7	4	4040.47
-8	1	1049.74
-8	2	2144.38
-8	3	3238.2
-8	4	4335.25
-9	1	1000.59
-9	2	2046.42
-9	3	3090.29
-9	4	4129.63
-10	1	1014.92
-10	2	2076.16
-10	3	3134.59
-10	4	4213.42
-11	1	1004.85
-11	2	2052.88
-11	3	3100.3
-11	4	4164.75
-12	1	945.861
-12	2	1932.49
-12	3	2917.95
-12	4	3955.15
-13	1	998.307
-13	2	2040.38
-13	3	3078.76
-13	4	4135.51
-14	1	966.429
-14	2	1972.15
-14	3	2974.84
-14	4	4056.41
-15	1	958.352
-15	2	1958.64
-15	3	2957.7
-15	4	3970.41
-16	1	970.732
-16	2	1977.63
-16	3	2984.97
-16	4	4002.56
-17	1	1013.65
-17	2	2064.9
-17	3	3114.19
-17	4	4190.98
-18	1	975.538
-18	2	1990.64
-18	3	3005.46
-18	4	4048.99
-19	1	1082.91
-19	2	2194.08
-19	3	3303.65
-19	4	4411.32
-20	1	912.778
-20	2	1866.83
-20	3	2819.21
-20	4	3781.63
-21	1	1002.36
-21	2	1989.95
-21	3	2975.53
-21	4	3986.71
-22	1	1075.38
-22	2	2144.25
-22	3	3210.17
-22	4	4312.84
-23	1	988.828
-23	2	2016.35
-23	3	3044.19
-23	4	4082.41
diff --git a/slope_intercept_cathode.dat b/slope_intercept_cathode_27Al.dat
similarity index 100%
rename from slope_intercept_cathode.dat
rename to slope_intercept_cathode_27Al.dat
diff --git a/slope_intercept_results.dat b/slope_intercept_results_27Al.dat
similarity index 100%
rename from slope_intercept_results.dat
rename to slope_intercept_results_27Al.dat
diff --git a/slope_intercept_results_anode.dat b/slope_intercept_results_anode_27Al.dat
similarity index 100%
rename from slope_intercept_results_anode.dat
rename to slope_intercept_results_anode_27Al.dat