Has anyone experience with adapting Canon FD lenses to Leica M mount? I see Fotodiox makes an adapter. Fotodiox have been decent adapters that I've found. One reviewer said of this particular one: "Two slight issues: 1. Focuses beyond infinity, but can be fixed by shimming inside of adapter (haven't done this yet) 2. Slight play from side to side so your lens could be off-center by a hair. " Doesn't sound like too much of a problem, but is there a better that anyone is aware of? Thanks!