Sheila
I don't know if you have seen the thread on my rebuild.
http://www.tnttt.com/viewtopic.php?t=28881&highlight=
The frame is very light on the Puck but I think a challenge to built from scratch, at least to have it come out as light and strong as the Puck. If I was building one it would be way heavier and maybe as strong. It is built of many different sizes of round, square and rectangular tubing, all of it thin wall. The thing was designed by a couple of aircraft designers. I have been amazed on how every part right down to the screws are no more then they need to be.
If you found one that needed to be torn down to a shell for a rebuild may need a bit more then that. There are rubber seals under the screw strips that could need changing to seal the skin seams. If they are leaking before you know it you could end up down to the frame like mine. A combination of steel, aluminum and water is not good.
Jerry