So again, how high is bones level on the B4.1? If 21mm is below bones level, I would agree that (for *me*, of course) that would be too low.
I just checked.
Dog bones level are about 23.5-24mm
Front arms level are about 24mm
Mine were just under level. I think it was 22mm's
I just adjusted them to 24mm (level) going to try that again wed with new motor system I just installed