Well since I will be having a surgery on Monday I have put my LF cameras to the side for a few months while I heal, just toting them around will be too much. I just sprung for a Mamiya Pro body with AE finder, 120 back, Power Grip II, Polaroid back, Polaroid riser, electromagnetic cable release, and 55-110 & 105-210mm lenses. Here is my issue, I want to buy some 120 inserts with cases so I can pre-load them rather than just have to buy a couple of whole backs. Now Adorama has some for $20 each but I am not sure that they will work, they say that they are for the Mamiya 645M body. They look the same but I don't want to buy them if they won't work. Does anyone have this same camera and have bought just inserts like I am wanting to do? If so which ones did you buy? I appreciate your help. Here is the one that is $20 with case. Insert Here is the one that is the whole back. Back with insert Really the question is... can I buy inserts for this camera or do I have to buy whole backs.