Read very good things about those controllers. Only negatives I read were about trying to reach anybody for any type of questions/customer service and then that it took awhile to get their order. May not be relevant anymore, no idea. I went with the other because of the amperage you alluded to.Um........
I guess mine was too oblique?
LOL.
This is the controller that I was thinking of, but I noticed just now that it is limited to 70A:
http://www.dccontrol.com/constant_temperature_controllers.htm










