Does anybody know how many times the M-11 circuit was revised? I'm trying to have a 1956 model rebuilt and the schematic doesn't seem to exist on the interwebs. the one on the Ric page is not the one I have. the phase inverter is totally different and some other things don't seem to jibe with that schematic. I've even seen a few with a ( shudder) SS rectifier. OUTRAGE! anybody? HELP!