I got a brand new Jobo CPA-2 today. The owner bought it but never used it once. It also came with many drums, reels, etc. I already have a new Expert 3010 drum for it. Anyway, it came with five things (see attachment) and I have no idea what they are. They are not shown in any of the manuals that came with the processor nor can I find them on the Jobo or Omega/Satter website. I'm sure that someone here will know instantly what they are but I'll describe it anyway. They look like big reels but they have no spirals so I don't know how they could be loaded. They are 5" in diameter and one side is black and the other side is clear plastic. The outer sides of the spokes are smooth but the inner side has notches or teeth. There are no spiral channels and it's not a sheet film reel. It can be set to two widths which pretty much match 35mm and 120/220 film widths but, again, there are no spirals. Are these some kind of spacers? If not, what are they? They fit in a print drum that came with the processor.