No. I don't think so. The guy that buys it will get all the data he will need to do the coversion and none will who are just free loading info. LIKE MOST FoRuM USERS!
No welding! The mag can be altered so that it can work in both the USAS-12 or the Saiga-12, universal. Oh'yea these mags are ten rounds and under so you are not manufacturing an illegal mag if you did make it only fit the Saiga-12.