Just in case anyone is interested, this is the fan/water pump timer I use, in conjunction with a "Bosch" style relay.
http://www.airotronics.com/AOTpdfs/intervalon/Airotronics-TBL.pdf
This is the timer I use for the 2nd stage of nitrous.
http://www.airotronics.com/AOTpdfs/multifunction/Airotronics-MC363.pdf
