Jeff,
I believe the engine is a Quadra 42. As far as the elevator linkage, i would just build up a new one. I dont like relying on a set screw sittin on a small flat to hold, especially on something as important as ye elevator.


As far as glassing foam. Taking some lightweight dry spackle and mixing some water in it to make a runny mixture, then spreading that over the foam helps seal up some of the voids on the surface of the foam so it absorbs less resin.