Done with the other leading edge. It only took about 2 hours this time.
This bit right here has been the hardest to sew in each one, followed by the end tip:
It's the reflective tape on the front, Dacron stretch strip in the back, Icarex from the body, plus 2x Dacron (4x in the overlap) for the leading edge, and the mesh which isn't difficult ... all of that tripled because it is a folded hem. 24 layer thickness. Every step I needed to manually push the needle down while turning the machine's wheel, and manually help pull it back out. Some required driving a hole through it gradually to get through all the layers.
Same with the two pieces at the end with all the folded over bits to make a non-fray corner, lots and lots of layers mean I'm basically manually stitching each one of the triple zigzag.
So the sails are basically complete. There is certainly room for improvement, those tiny white corners on the leading edge bug me. I think next time I'll need to make the LE about an inch narrower, which should help it on either side.
Stitching isn't perfect, but should be adequate. I'm likely going to be the only person most concerned about how some of the zigzag stitches are narrow, some wide, some rather strange looking. But it should hold:
Even so, that's some more checkmarks down the long list:
✔ Figure out paper prototype dimensions
✔ Cut and tape paper prototype
✔ Verify paper prototype, refine template
✔ Cut pieces for full sail
✔ Sew full sail body
✔ Cut pieces for vented sail
✔ Sew vented sail body
✔ Prepare reinforcements
✔ Sew reinforcements on both sails
✔ Sew hems on both sails
✔ Apply fray check and check all the details
✔ Cut leading edge pieces
✔ Sew both leading edges
✔ Attach both leading edges
⬜ Sew on LED light strips on both kites
⬜ Final soldering for joints on LED light strips on both kites (48 solder joints. Eeek.)
⬜ Tie bridles
⬜ Attach bridles, elastics, and endcaps
⬜ Create kite bags for both kites