I bought some old Ford banjo rearends today, and also a pile of Columbia stuff. The housings measure out to be a ‘40 and a ‘41. Now I need to bone up on these things to see if I have enough to put one together. I knew this was going to turn into a new rabbit hole to lose myself in….. Any of you Columbia experts have good exploded diagrams with names on the pieces so I can see if I have them all? Or any other instructional documents to guide a new obsession?