Okay, I have only been taking pictures for about 20 years now, but I guess there are those who feel the 120/220 situation is still nonsense, most of the time, unless you have a Russian Camera that has extremely loose tolerances, you will jam the camera or the back when you try to shoot 120 in a 220 back.
But please don't take my word for it, give it a try a few times and see what your experiance shows you..
Awe the wonders of cyberspace.
Ground Glass Specialties
Satin Snow(TM) Ground Glass.