Ok, VU meter response seems good enough to me, what say you folks ?
https://youtu.be/XdCO1633hGg
Also, added the ability to enter values for VU meter range.
This along, with the Reaper values for min/max VU in Preferences->Appearance->Track Control Panels are used to enable you tweak the meter to taste, as well as get generally more accurate values.
Now I'm going to apply the same rules to Faders, in an attempt to get more accurate tracking between Reaper and the surfaces.
Note that the values are set per fader/meter, so there's lots of room for flexibility there.