Dan, I think you're on the money. Seems while sitting on the counter top, a dude by name of Justin came in the shop. Son says Justin is their lathe service engineer and really knows his metals. This Justin dude took the bellcrank saying he'd get the mother 'sparked'. Next day the bellcrank appeared on the counter. Perfect hole.
Son called to ask how and say thanks. Justin says it was a lot harder than usual, says bit difficult to talk, has couple of fellas in to test the gas..... he pauses, says he's not on gas.....
Any how, big thanks to the man - wherever he is, and I'll get it all bolted up and post some pics.
Not saying it'll work!