say you have a rack with like 6 shelves like can you control each thing of flexwatt with 1 thermostat or do you need 1 for each shelf?

and with the racks do you just put the flexwatt down and then put the plastic tubs right on top of it?

and are the thermostats from http://www.reptilebasics.com good or are there better ones or decent ones for cheaper?

and how do the wire and clip sets for flexwatt work?

any extra info yall think i should know would be great I'm trying to learn and understand this stuff lol.