I've used a 5x7 Jobo Expert drum for many years on my CPP-2, but lately I've started to develop more film, and I'd like to up my capacity. The 10-sheet Expert Drum is a bit too pricey for me. Since I already have some 2500 series print drum, I've thought about adding two 2509N reels, which hold 6 sheet each. I could put them in the proper drum to do 12 at a time. Does anyone here use the 2509n reels? How happy are you with them?