Ok I finally got around to do some fixing. I added the layout without mcp folder indents. You can set Reaper to use it as default in View -> Screensets/Layouts -> Layouts -> set "Mixer panel" to "No indent". If you switch between screensets be sure to save this preference to those which have the mixer visible.
I couldn't figure out how to stop Walter from displaying the faders when the height is too small. I think I'd need to do something like this:
Code:
set volheight to h-low_marg
only display mcp.volume when volheight>~100 or something
but I have no idea how to do the math in Walter for the first part. Any tips? :P Couldn't find anything in the Walter guide.