I don't know why the seat back gave me such a hard time. Well I do know. I am mixing and matching Saturn (now ntsengineering) and Vodou plans. So I am using a 1x2 for SB3 (the bar mid height the seat back) instead of a 1x1. This is now Vodou does it and I like it. Give you something solid to build the upper rear suspension area from.
So this meant that SB4/5 needed to be 25mm shorter than a Haynes Roadster. SB4/5 are also 240mm apart from outside to outside. This is how NTS does it.
So all that gave me fits. Mostly because I wasn't sure which plan I really wanted to go with. Then add the compound miter cuts on SB6/7... it took me longer than it should have.
