Thanks for sharing, I have only made 4 Bobber seats first three I used the round braid, takes a lot of time. just the braiding took me 12hrs.I bought a industrial machine And learning to use it, on my last seat I wet molded top and bottom, then machined sewed the top and bottom together it' was so quick, 30 minutes to sew. I like machine sewing.
They way you sewed your seat using 3 pieces is interesting, I have made a couple bags making the hem on the inside then flip it. Your seat is kinda like that.