For awhile we had fuball island on Ozkansas restricted to early war planes only. Now that was great !
The fighters were the Spit I, Hurr I, Spit V, Hurri II, 109 E and F, F4F, P-40B, Me 110C, Zero, C-202, and probably a couple of others that I can't think of.
The bombers were the Ju-87, Ju-88, SBD, Val, B5N, Boston III.
Meanwhile all the GVs were enabled and were fighting like crazy without having to worry about 1000 ft agl Lancs killing them by the handfull.
It was a blast!