Looking good so far. I also have a Kavalier kit that I plan to build. I will be watching your progress eagerly.
Although the OS 35AX might be adequate power, it might be light enough that you will have to do some jockying with weights to balance the CG. It might come down to adding weight in the nose or a bigger heavier engine. I will be interested to see what your outcome will be. I have some light 40's and normal 46 engines that I could power mine with . Your experience with this will help me decide.
Thanks for doing this thread.