Hmm, I tried posting this yesterday and it got eaten somewhere in cyberspace, so let me give it another try.

I have a Toyo 45AX onto which I would like to attach a 6X17 back. I know there are at least a couple available and would like some advice from those who have used these backs as to which are easiest, best built, etc. I'm trying to avoid a buying mistake.

The lenses I own are a Super Angulon 90mm f8, Nikkor-W 135mm f5.6 and a Schneider Symmar 180mm f5.6/315mm f12.

Thanks in advance for your help. Bill Barber