hferrell, I'm not sure I agree with you. The point of the wedge it to keep the outboard from bouncing by preloading the hydraulic piston on the trim unit, right? In theory this should put less strain on the transom, but in reality I doubt it really does to much. Even with the system locked solid you still have a large amount of weight that is subject to dynamic force and will put pressure on the transom because it is all ties into the mounting bracket. At least that's what makes sense in my mind.
I think the best thing we can do for our boats is to make sure the transoms are solid, and make sure the suspension set up on our trailers is correctly matched to the weight of our boats. IE - having a 800lbs skiff with a 2500lbs axle is bad.
That's just all IMO, most boats are built well enough today that even a bad set up may not effect them.