02-20-2026, 03:18 AM
Those are some pretty wavy stringers? As far as the spacers go on the seat back, From my perspective, after spending way to much time trying to fit the Seat Back to the frame per the instructions and the videos as well as speaking to some other builders a couple years ago when fighting that fitment, I came to the conclusion there will be some amount of spacers required. On the A600 videos as I recall Mark Peterson specifically addressed the potential need for shims of some sort. On mine, (which is not yet completed) I have to have shims/spacers each different thickness on 3 of the four bolts that mount the seat back to the frame. My understanding is with the seat pan as far back and left as it will go, you will only certainly end up with gaps between the frame and seat back portion. Just because of the quality of the molds from the factory. And to use shims rather than try to pull the backs up tight with the bolts as that will deform the fiberglass and result in cracks down the road.
Part of one of the kits I am using was riddled with what I would politely call "not up to my specs" and after a short inspection, I determined I was going to take everything back down to scratch rather than "trust". The only way I would be comfortable "Verifying" the build. Restorations or rebuilds are always more challenging in my experience.
Part of one of the kits I am using was riddled with what I would politely call "not up to my specs" and after a short inspection, I determined I was going to take everything back down to scratch rather than "trust". The only way I would be comfortable "Verifying" the build. Restorations or rebuilds are always more challenging in my experience.