Bought it yesterday.Slightly used but in excellent condition.Anyone have tips on mixer maintenance or anything I shud know.I use this mixer with my PSR 740.First time I handle a mixer...THX

Sunny,
sorry, I don't know anything about studiomaster mixers. These are not popular here in California I guess, because although I've heard of studiomaster, it's not asked for by customers and no salesman has ever come into my store trying to sell me these.
Mixers really don't require any maintanance that I'm aware of. Just don't drop it! or spill anything on it!
George Kaye
Kaye's Music Scene
Reseda, California