If it helps, here are the settings I use:
r_StereoStrength = 2
r_StereoScreenDist = 8
r_StereoEyeDist = 0.005
I found the adjusting the r_StereoEyeDist variable in particular allowed me to get the red dot focused nicely, with little ghosting overall.
Thankā²s a lot for these settings, looks much better now with minimal ghosting.
