diff --git a/V4/demo/demo.cpp b/V4/demo/demo.cpp
index 1cb10a2..ba45699 100644
--- a/V4/demo/demo.cpp
+++ b/V4/demo/demo.cpp
@@ -131,5 +131,5 @@ int main() {
   auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(stop - start);
   
   std::cout << "Mach for CI " << ci << ": " << aioMach << std::endl << std::endl;
-  std::cout << "END All-In-One, " << duration.count() << std::endl ;
+  std::cout << "END All-In-One, " << duration.count() << "ns" << std::endl ;
 }
\ No newline at end of file
diff --git a/V4/demo/demo.exe b/V4/demo/demo.exe
index 4621d25..d3920d5 100644
Binary files a/V4/demo/demo.exe and b/V4/demo/demo.exe differ
diff --git a/V4/demo/demo.ilk b/V4/demo/demo.ilk
index 626a0c9..4ef3bf3 100644
Binary files a/V4/demo/demo.ilk and b/V4/demo/demo.ilk differ
diff --git a/V4/demo/demo.obj b/V4/demo/demo.obj
index c37320e..654a55e 100644
Binary files a/V4/demo/demo.obj and b/V4/demo/demo.obj differ
diff --git a/V4/demo/demo.pdb b/V4/demo/demo.pdb
index 13a873d..0f0eeee 100644
Binary files a/V4/demo/demo.pdb and b/V4/demo/demo.pdb differ
diff --git a/V4/demo/vc140.pdb b/V4/demo/vc140.pdb
index 07efeb5..1f73603 100644
Binary files a/V4/demo/vc140.pdb and b/V4/demo/vc140.pdb differ
diff --git a/V4/econSpd.h b/V4/econSpd.h
index 90114ad..6cbce69 100644
--- a/V4/econSpd.h
+++ b/V4/econSpd.h
@@ -35,10 +35,10 @@ float roundTo(float value, char decimals) {
 }
 
 /// @brief Bounding function for altitudes in accordance with data granularity
-/// @param altitude Altitude in FL
+/// @param altitude Altitude in ft
 /// @return Lower bound in FL, upper bound in FL, ratio between bounds that equates to flightLevel
-std::tuple<int, int, float> boundAltitude(float altitude) {
-  int flightLevel = (int)(altitude / 1000) * 10;
+std::tuple<int, int, float> boundAltitude(int altitude) {
+  int flightLevel = (int)round(altitude / 100.0);
 
   float lower = flightLevel - ((flightLevel - MIN_FL) % FL_STP);
   float upper = (flightLevel - MIN_FL) % FL_STP != 0 ? lower + FL_STP : lower;
@@ -51,11 +51,11 @@ std::tuple<int, int, float> boundAltitude(float altitude) {
 /// @param weight Weight in kilogrammes
 /// @return Lower bound in t, upper bound in t, ratio between bounds that equates to weight
 std::tuple<int, int, float> boundWeight(int weight) {
-  int wgt = (int)(weight / 1000);
+  int wgt = (int)round(weight / 1000.0);
 
   float lower = wgt - ((wgt - MIN_WGT) % WGT_STP);
   float upper = (wgt - MIN_WGT) % WGT_STP != 0 ? lower + WGT_STP : lower;
-  float ratio = (wgt - lower) / WGT_STP;
+  float ratio = ((weight / 1000.0) - lower) / WGT_STP;
 
   return {(int)lower, (int)upper, ratio};
 }