I'm trying to put together a compact legacy lens kit and this seems like a great addition. I just got a refund for one of these that never made it here from Russia, so I'd like to get one from relatively local, in the US. It would be nice if you'd already non-destructively modded it for infinity focus on a standard M39 adapter. I would also possibly take an M39 adapter if you want to sell that too, as then I wouldn't have to swap the adapter between my M39 lenses. Thanks!