Mike, don't sweat the electronic headaches for the Nikons. I think you can do it mechanically easily enough. Totally different design than Canon's EOS situation. I'll send you a pic.

Of course there's no good reason not to use a clamping system. Use the wrong alloys and/or finishes in that system and things can get stuck. Needing a mallet to get a lens out of a mount kind of reduces the speed advantage.
Lenses and mounts are generally designed as a system, the materials used can be as vital as the dimensions.

I'm not actually using the EX3, just got it to look at and bolted the kit together shoot a few tests. So for this it was just hagning off the back of the lens, but if I were to use one I'd probably get a plate made as I do with the full-size cameras.
Steve

Nonsense, never had a problem in years with PL, Aaton and B4. The good reason to use it is for strength and lack of movement in the mount. Maybe my requirements are more stringent than yours!
Steve

Sorry but I fail to see what we're disagreeing on!

Of course PL mounts are rock solid, I never said otherwise. Of course they're designed for and have strength and lack of movement.

Mike,
I'll be eagerly awaiting your Canon EF adapter if you are able to make one work! You have my contact information. I'll save the money I was going to spend on some Nikkor glass and use it for an EF adapter as I already have lots of Canon EF glass. This is the 'holy grail' for me. And after buying and using your Nikon adapter, I know the quality will be first-rate.
cheers

Derek, of course.

Will add your email address to the list