tool list- order from RBI and have rich assemble the flex watt for you(its free/any size you need), attach to where needed, plug into thermostat,place probe on flex watt, run some test trials(and do any adjustments as need), then your all set, check out RBI flex watt FAQ and it will give you a lot of info on the stuff, and if you have questions on what size you need email rich and he will take care of you(amazing guy to deal with), and pick up some of his hides(IMO they are the best hides out there)
Tom