I am new to this site, and have a 1948 B12 that I am begining to restore. The outer plywood needs to be replaced. I have started to research birch plywood and am thinking of going with rotary cut Baltic birch 1/4". Would this be a good choice? Any information would be appreciated. Also, the frame work is broken above the windshield by the front doors - I understand this was a weak spot. Any reccomendations on how to best repair this?