I'm up to 256 now. Never have marked them or given much thought to it. I keep a detailed spreadsheet on them though.
I wanted to make a 'one size fits all' mount but the early guns have the rear sight dovetail all over the place. Above 200K the sight location is fairly consistent so there is a bit of a standard. I like to get the measurement on everything though because every once in a while there is an oddball.
I've made them for every model made I believe.
