u/Far_Chair2404

Hello! I am a beginner onshape user and would like to design a motorcycle side cover plate as a birthday present for my father.
Thickening of surface 1 works but not for surface 2 and 3 which both contain a projected curve....

I would be really thankful if you could help me!

here is the link:

https://cad.onshape.com/documents/a31124a3d7a945aab8c54c4c/w/edbeaab7a2893664665e072b/e/83214396655102e389d2708f

P.S. There seems to be some glitch with the reference images...