Post your results. I'd like to see them. I just bought a pair of RB67's that should be showing up today with aluminum hard case, WLF, Metered Prism Finder, 2x converter, 2 120 backs, 1 220 back, 90mm F3.8 and 180mmF4.5. I can't wait to give them a once over and try them out!
Ok, the film exposed is in the fridge now and i am busy right now, in few hours i will start to process the film and see if the results are fine enough, but don't expect the images are of something interesting, it is just my house interior design but with 90mm it is so tight and later i will buy a wider lens, but hope the results you will find them as good enough for you to start with your kit.