I have a 20k gallon inground pool and have been using an SWG system from the beginning. I believe I started off with a Lectronator unit...have gone through several models/brands/iterations over the years...now I'm using an AutoPilot DIG-220 with SC-60 cell. I am in need of a replacement cell for the SC-60. What about these generic replacement cells made by Compu Pool? Can anybody tell me about these models? How long have they been out there? Are there any compatibility issues with the AutoPilot cells? I would think that possible patent infringement would prohibit another manufacturer like Compu Pool from manufacturing a cell that has the same design as the AutoPilot cell. What's the track record of these Compu Pool cells? Anybody out there using one as a generic replacement for an AutoPilot cell? If so, how's it working? The price difference is very appealing, and I'm sure there are a lot of other pool owners with AutoPilot systems wondering the same thing when it's their time to buy a new cell. Any advice would be most helpful. Thank you for your assistance. Just found this site yesterday. It looks great. Have signed up as a lifetime supporter.