Sorry to hear you're giving up, but you are doing this for fun, after all. If it hurts, stop.
(I get no pleasure dealing with and chipping locos myself, BTW. Even modern stuff. It is far more difficult than it should be. Poor instructions, something always seems to break, mounting clips, detail, etc., etc. It isn't acceptable when the (expensive) locos are sold "DCC Ready", i.e. for the user to chip themselves.)
Best of luck. I can't help you with the queries, either. Sorry.