really appreciate the 2x4 layup on the plans. I find that the more rows you have the more out of wack they get, so only having 2 rows makes it easier to get squared up. That scraped bottom reminded me that i wanted to try cutting some thin plastic out, like from a plastic file folder, to give it a nice protected belly slide area.
On the fold/crease areas are you doing a 50% cut with a blade like the lasercut kits?
Fold/Crease: Yes...with the similar "crush seam with BBQ skewer/pencil" & "bead of glue in the crease" techniques as well.
Curious: What do you mean by "2x4 layup" ?