If you're not worried about 20g crashes (and I'll admit >that I'm not expecting one either), then don't sweat it. Larry's thin >brackets and small bolts are probably all you need... >Mark Langford, +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Unfortunately, with seat belts, we build them for what we expect NOT to happen. The info you posted for the seatback reinforcement is something I did while building although I had not seen it at the time. The difference is I put the 1/4" ply on the bottom and ran it all the way to the ply on the sides. That also gave me the extra glue area. I knew I was going to use my seatback rest to set on for entry and exit. Also, on my KR, I seem to recall having a 5/8" spruce cross piece on the floor that the rear spar is glued to. I don't remember if that is where the plans place the cross piece or not. If I ever hit an oak tree instead of the pine tree you described, I hope someone remembers to check my seat belt attach brackets. :-) Larry Flesner Larry Flesner