Fellow tub thumpers, got a question regarding vintage ludwig kits: three ply mahogany/poplar/mahogany kits with sound rings: what series were they? More specifically, what series were the 3 ply maple/poplar/maple with sound rings? I'd like to purchase a set of the latter but don't know what "line" I'm looking for. Also, did ludwig ever make a straight 3 ply maple shell with sound rings? I've played both of the other 3 play kits and preferred the maple configuration, but they both had the same badges with no other discernable labels or identification.