i'm rehearsing last night on my set (mapex saturn walnut/birch) and i'm hitting my 12" TOM, but deadness comes out every freaking time. i've tuned it over and over again. i've changed heads constantly. i've even sent it to my 5star drumshop and had the bearing edges checked out. nothing works..i ended up putting my 8" gretsch renown maple tom in its place..any advice..?