This code adds the feature of using MPH or KMH, which is configurable at the top of the .PY file:
#Set/Change these value as opposed to making INI changes
HideIcon = 1 #Set to 1 to hide the AC Icon, 0 to show it
backgroundOpacity = 1.0 #Background Opacity can be anything from 0.0 to 1.0
drawBorderVar = 0 #Set to 1 to draw the border, 0 to not draw it
appWidth = 210 #Width of the app window
fullSpeed = 0 #Set to 1 to update the screen on every frame, set to 0 to update every tenth of a second
displayPause = 1000 #hold the top speed for this many milliseconds after getting back on the gas
useKMH = 1 #set to 1 for KMH, set to 0 for MPH
Cheers,
Esotic