The bell syphon as a backup is a great idea and would be easy enough to plug when the pumps were working. While I really like the idea of the displays and collection of the data, I know that is just the geek in me. Sometime it is just best to go by the K.I.S.S. principle. The fancier things are the easier they breakdown. That said, any chance you have a list of the schematics for the system and part list?

Jason