Well I took the caps off the wings of the transom (port and starboard) Took a screwdriver and basically pull nothing but mush out.
Drilled 4 holes directly across the transom at about water level and I think 1 hole produced wood that wasn't saturated. Other than that it was worm dirt!

Good new is that every place I exposed, the wood seperated from the skin completely clean! Probably can't expect that on the whole thing I'm sure.

Either way, transom is crap, done. Only decision now is whether to repar it as is or make a full transom with stainless bracket.

LOC derby in 25 days!!

Mike