Preliminary discussions have been engaged in with a good contact who can overhaul KV10s.  RRRG has a good number of both KV10s and their control cards in our possession but we have no idea if any or all of them are actually serviceable!  For the uninitiated, a 50 has two KV10s: one controls the main generator field strength and the other the ETH generator field strength - the difference being the control cards in the KV10 which define its function (main or ETH generator).  We understand this same contact can overhaul CU1 control units (the "master brain" of a 50) and we hope to have more news on these electronic component overhauls in a month or so.