I once found a Mercedes badge lying on the floor in a Dodgy area not far from me I could resist picking it up and taking it home, it is now lying in the garden somwere, probably a future conversation piece.
I once got a a Pentax to M42 adapter at my local photo shore for about £0.20 < no use to me gona sell it on ebay when I get the chance.
I know what you mean. Every time i enlarge one of my 4x5's to 16x20 i wish it was as sharp as the contact print. I think i'll go wider though, maybe 5x12 cuz it's so close to the anamorphic 2.35 format of movies.