I may be over thinking it but I cannot figure out an easy way to build a nice and square mitre box for a back saw, and I really do not want to buy one. I thought about building the box and then running it through table saw. This would make a square but too large kerf. I'm not good enough with a hand saw to saw to a square line, and any type of square guide I can think of would scratch the saw. Any ideas?
Enjoying the forum by the way, even though you guys have enticed me to by too many planes, braces, saws...