Attaching transom

While being ill now for a few days already my sick mind kept tinkering on how to best fix the quite heavy transom to the whole boat assembly while epoxy cures, and the toughest, keep it level, at correct angle and rigid. This is what I came up with today:

Took a basic old carpenters stool (or whteva it is called), a pair of piano hinges and voila! It turned out easily adjustible levelwise as well as anglewise. Now, let the epoxy cure.