As for the QUEST/FSI link:

FSI obtained the motor machine that once was owned by MPC/AVI. Somewhere , G Harry Stine had gotten his hands on the operating manual. Exactly what negotiations went on between G Harry and FSI, but FSI and QUEST both began selling 18mm motors that had appeared to come from the same motor machine. The MPC, FSI, and early QUEST 18mm motors in my collection all appear identical.

The next part is internet rumor, and I have no verification:
I believe that the machine ended up in QUEST's hands, and after an accident, it was scrapped.

Phred

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GET GOONY!!