I have a Jobo 2820 print drum, which I would like to convert to use with sheet film. I have just realised I can take the beaker out, and replace it with the funnel and centre core part from my 1500 series tank. The base part of the centre core, sized for 2 x 35mm reels or 1 reel at 120 size, fits perfectly. I would like to use it to process 4x5 sheet film, is there any reason why I could not do this if I bought a 2509N reel? Will the ribs around the edges of the tank cause any problems, either by touching the film or inhibiting the flow of chemicals? I plan to process by rotation.