I really don't think its that rare if at all. Others have posted about first the last bits of hollowed models failing and then eventually everything does and that's how it happened with me. I'm still waiting to hear back from frikn' support and I have already been very clear that I think the should provide the "upgrade" either free of charge or at cost at most! I've burnt through three liters of resin and four PDMS re-coatings with only a half dozen successful prints and a mountain of junk. They keep on telling me sorry but the words by themselves don't do squat. They replaced my first two failed machines without any hassle but they've dropped the ball badly this time so far and right on my foot! Waiting over a week at a time for replies is ridiculous! And I've sunk every penny I could scrape together trying to get this thing going I was hoping to be buying a second printer by now but no such luck.