Hi Mariusz and all:
Thanks for the updates - I sent a PM to AZGary and I'll follow up with one to Sander...There have been new thoughts on the Lenco Lovers Forum (including regrinding options) that may be viable, but it is still evidently an issue. Also, from what I can read, nearly all the models of Lenco (not just L75) had the same basic motor (differences in platters (heavy/light) and other constructions), so finding other "cheap donor" models for parts may be an opportunity for some (at the risk of cannibalizing the remaining models)...
Best holiday wishes,
Jonathan