I think I'm going to use some big T-nuts to attach my side panels to the frame. How does one install them, though? Do I just drill the hole for the shaft, countersink a tiny bit for the base and then use a hammer to pound those little spikies in? It's the spikies that really have me confused. They look too big to try to pull in just by screwing a bolt in the other side like I would to pull the squre part of a carriage bolt into the hole.
edit: spelling