I'll second the responce about the Yankee tank. It sucks. However, if you do get one, Use a couple of rubber bands to hold the lid on. I lost several batches of film this way. The combi plan is nicer. However, neither of these is easy to fill and drain. I finally broke down and bought a Jobo with an expert drum. My negatives promptly began looking better. I believe that this is mostly due to my ability to now control the process with more precision. If you look around on eBay you can find nice Jobos for a few hundred bucks.