I have a Rockband 2 drumset that I upgraded to pro by adding 3 cymbals (yellow, blue, green). I have been doing a lot of Pro Drumming and I can play most songs on hard and some easy ones on expert. I can even gold star a handful of 3 notches of difficulty songs.
I would like to make the leap to Pro Drums expert. Would it help to drop the cymbal count from 2 to 3 (by lowering the physical difficulty)? Are the Pro Drums scores different when using 2 cymbals instead of 3? Whould that be considered cheating?