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i have tested the leica m with f3 . The one selling in EBAY from poland works just fine.

Anyone have experience with the P+S Technik Leica M to F3 adapter?
I had one for a week but returned it. The adapter works fine, but Leica M lenses are not ideal ergonomically due to the small size, the focus tab built into the lens, and the short focus throw on most lenses. The lens also had a bit of play in the mount when attached to the adapter.
I ended up putting together a set of Leica R lenses, converted them to Nikon mount, and now use them with the Prolock adapter which has a positive lock on the mount similar to the All Star. The Leica Rs have a longer focus throw and can easily have focus gears added to them.
Thanks for the info! Where did you find Leica R glass?
I found a couple of lenses on Ebay and the rest I bought from an individual who became tired of waiting for a digital R still camera that as yet has not been produced. I still watch a few focal lengths on Ebay but the word is out and prices are rising. I saw a mint 90mm R go for $3300 about two months ago, and last week one sold for $3800+.