Decided to hack apart my seat unit after all this time, as the shape wasn't quite doing it for me anymore and when I figured out how I wanted the seat upholstery to look I realised I couldn't do what I wanted using it as it was. It's quite funny because the seat unit and cowl led the design from the start, but, design evolves and here we are. I think it's looking much better now by following the lines of the new frame. I'll be making a seat pan next.
Chopped up the unit, cut new lines and re-glassed the original bum stop back on. I made a pretty sloppy paper template along the way to try and check the looks.