Bf 110 cockpit, Wahlschalter and bomb load.

[Kodoss]

Found it.

bombload - breaking.jpg

First position [a] states normal C-1 to C-4 variants (without bombs and additional fuel tanks)
Second position [b] states variants with only strengthend main gear and not strengthend tailwheel.
Third position [c] states variants with strengthend main gear and strengthend tail wheel.

I think air resistance for propeller by standing A/C with 12:00 pitch is not modelled jet.
See 9. on the left page.
Will check it now.