This depends on how much of a hoarder you are, but here's what I did: Some Kodak 116 format cameras have nice big pressure plates in them, larger than 120 width of course. Pull one out of one of those, and put it onto the 122 camera back-- those're aluminum and easy to work with, I just threaded some small steel screws into holes I drilled in the aluminum- used them as thought they were self tapping, since they were so much harder than the Al- to hold the PP on. You adjust the height (and therefor the pressure) by the spacing of the mounting screws.