My opinion on the back part of the cabin sidewall [not that it needs to be your opinion]:
- either go with parallel leading and trailing edges OR square it off [vertical] at the back - I saw that on a 23 the other day and it looked fine. Having the trailing edge follow the leading edge creates a surface in the cockpit for storing small items in the dry [I have a wooden pocket that stores knife, scale, etc] - also creates a little wind shelter under the roof and between the walls, although my dodger does most of that]
- non-parallel leading and trailing edges less attractive imo
- the porthole idea looks cool; a little bit old school [that one in Courtenay has that]
But most importantly - what awesome work, and what a great result so far!