I am putting my Grover 8x10 (w/ 5x7 and 4x5 backs) up for sale again to help raise funds for this project. Gotta get it done pretty soon; I have about 8 to 10 weeks to shoot approx. 200 dead ends here in my neighborhood in N.E.L.A. for a book. I think I am gonna just get a Horseman revolving 2x3 back for my Sinar. There is one on eBay now that, again, is only 15 minutes from my house. I am lucking out with local items so far on this hunt.
If all else fails, I will just slap my Polaroid packfilm back onto the Sinar as a last resort. Would certainly take a load off at the printing and processing stage, though would put a hurt on my pocketbook buying all that FP-100C.
Thank you for all the help. It is most.......er....helpful! Keep the info coming if anyone has something to add.