grrr i hate you can only update for 10 mins.
You need to add flexwatt and the connections...that was $55
sub total $220...plus thermostat i got a Herpstat for $119.
$339 total
I actually was able to build one 9 section rack and one 7 section rack with 2 5x8s and to pieces of 17"x10' I found locally.