Sounds interesting . . . don't have any experience with it, sorry.
I did just notice (from looking at your "blog") that our Tradewinds are only 8 digits apart. Ours is 240301T, so just a little older, and it has (or had) the Twin Layout. We had lots of hidden damage as well but thankfully our frame only had minor problems - not nearly like what you have found w/yours. Looks like Colin is doing excellent work, we applaud you for saving this one . . .
Aluminumbskull with Led Balloon in Drag
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate