Got it yesterday.
Apparently, the seller (same dude who sold me the Viv Series 1 24-48mm) thought it was broken.
It sorta is (and some bugger's nicked the black tip off the advance lever, but I should be able to fix that) and sorta isn't...the thing is the non-official MLU just works really, really well with it.
I think.
Well, on slow speeds from 1/125 and down, the mirror, nine times outta ten, will get stuck up (the shutter fires properly, et al.)
Think I've found a
workaround, maybe.