While working on the solar roof of the bike, I realized how amateurishly I approached the design. Essentially, I used a "sculptural" approach without sketches, parameterization, constantly breaking the continuity of the timeline and the semantics of the components. This works for small details, but with ongoing changes in a complex structure, "technical debt" starts to hit hard. I will try to design a new frame from scratch, taking into account the accumulated experience and previous mistakes.