Hi, I would like to mount a 90mm lens for the Mamiya RB67 on my Toyo 45G. I have modified the Toyo to mount a DSLR to the back standard. (See http://www.flickr.com/photos/9476880@N02/sets/72157621949266496/ .) Unfortunately, there is not enough clearance between the Schneider 90mm and the DSLR mount for me to focus at infinity. The Mamiya 90mm would work because its asymmetrical design creates a longer distance between its flange to focal plane when focusing at infinity (112mm). Does anyone have any advice on how best to mount the Mamiya lens on a Toyo lens board? Thank you in advance.