diff --git a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhBase.java b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhBase.java
index 3f59c38..fa72c5a 100644
--- a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhBase.java
+++ b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhBase.java
@@ -34,7 +34,7 @@ import java.util.concurrent.TimeUnit;
 // AverageTime: "Average time per operation."
 // - "This mode is time-based, and it will run until the iteration time expires."
 //@BenchmarkMode(Mode.AverageTime)
-//@Warmup(iterations = 6, time = 1, timeUnit = TimeUnit.SECONDS)
+//@Warmup(iterations = 20, time = 1, timeUnit = TimeUnit.SECONDS)
 //@Measurement(iterations = 6, time = 1, timeUnit = TimeUnit.SECONDS)
 
 // SingleShotTime: "Time per single operation"
diff --git a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCgl.java b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCgl.java
index dff9de6..fd0973f 100644
--- a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCgl.java
+++ b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCgl.java
@@ -23,7 +23,7 @@ public class JmhCgl extends JmhBase {
 
     // Either all or a selection of sort implementations.
     //@Param()
-    @Param({"TIM_SORT", "FASTER_FINN_SORT", "IMPL_M_11", "IMPL_M_21"})
+    @Param({"TIM_SORT", "FASTER_FINN_SORT", "IMPL_M_40"})
     SortEnum sortEnum;
 
     @Override
diff --git a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCompetition.java b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCompetition.java
index 8d77a10..cd0f4eb 100644
--- a/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCompetition.java
+++ b/app/src/jmh/java/de/uni_marburg/powersort/benchmark/JmhCompetition.java
@@ -16,9 +16,18 @@ import org.openjdk.jmh.annotations.State;
  */
 @State(Scope.Benchmark)
 public class JmhCompetition extends JmhBase {
-    @Param()
+    //@Param()
+    @Param({
+            // Top 4 Heavyweight by #comparisons
+            "COMPETITION_207", "COMPETITION_214", "COMPETITION_213", "COMPETITION_236",
+            // Top 4 Heavyweight by #merge-cost
+            "COMPETITION_198","COMPETITION_199","COMPETITION_232","COMPETITION_231",
+            // Top 4 Heavyweight by combined metric
+            "COMPETITION_214","COMPETITION_218","COMPETITION_236","COMPETITION_213",
+    })
     CompetitionEnum dataEnum;
-    @Param()
+    //@Param()
+    @Param({"TIM_SORT", "FASTER_FINN_SORT", "IMPL_M_40"})
     SortEnum sortEnum;
 
     @Override
diff --git a/app/src/main/java/de/uni_marburg/powersort/FinnSort/FasterFinnSort.java b/app/src/main/java/de/uni_marburg/powersort/FinnSort/FasterFinnSort.java
index 32fb651..c4a4070 100644
--- a/app/src/main/java/de/uni_marburg/powersort/FinnSort/FasterFinnSort.java
+++ b/app/src/main/java/de/uni_marburg/powersort/FinnSort/FasterFinnSort.java
@@ -172,7 +172,7 @@ public class FasterFinnSort<T> {
         }
 
         // TODO: Verify if this is correct
-        int stackLen = ((int) Math.ceil(Math.log(rangeSize))) + 2;
+        int stackLen = ((int) Math.ceil(Math.log(rangeSize) / Math.log(2))) + 2;
         runBase = new int[stackLen];
         runLen = new int[stackLen];
         runPower = new int[stackLen];
diff --git a/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_1Test.java b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_1Test.java
index b527e7a..064d661 100644
--- a/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_1Test.java
+++ b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_1Test.java
@@ -1,5 +1,8 @@
 package de.uni_marburg.powersort.sort;
 
+import org.junit.jupiter.api.Disabled;
+
+@Disabled("Disabled in favor of IMPL_M_2")
 public class IMPL_M_1Test extends AbstractSortTest {
     IMPL_M_1Test() {
         sortAlg = SortEnum.IMPL_M_10;
diff --git a/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_2Test.java b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_2Test.java
new file mode 100644
index 0000000..b6820d0
--- /dev/null
+++ b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_2Test.java
@@ -0,0 +1,10 @@
+package de.uni_marburg.powersort.sort;
+
+import org.junit.jupiter.api.Disabled;
+
+@Disabled("Disabled in favor of IMPL_M_3")
+public class IMPL_M_2Test extends AbstractSortTest {
+    IMPL_M_2Test() {
+        sortAlg = SortEnum.IMPL_M_20;
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_3Test.java b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_3Test.java
new file mode 100644
index 0000000..c7c9f60
--- /dev/null
+++ b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_3Test.java
@@ -0,0 +1,10 @@
+package de.uni_marburg.powersort.sort;
+
+import org.junit.jupiter.api.Disabled;
+
+@Disabled("Disabled in favor of IMPL_M_4")
+public class IMPL_M_3Test extends AbstractSortTest {
+    IMPL_M_3Test() {
+        sortAlg = SortEnum.IMPL_M_30;
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_4Test.java b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_4Test.java
new file mode 100644
index 0000000..b6d9649
--- /dev/null
+++ b/app/src/test/java/de/uni_marburg/powersort/sort/IMPL_M_4Test.java
@@ -0,0 +1,7 @@
+package de.uni_marburg.powersort.sort;
+
+public class IMPL_M_4Test extends AbstractSortTest {
+    IMPL_M_4Test() {
+        sortAlg = SortEnum.IMPL_M_40;
+    }
+}
\ No newline at end of file