I use a Weber MiniMass 25 for my Epi. Way cheaper ($75) than a THD and it has a switch for 4/8/16 ohms and a high freq boost if you need it. It does take forever (3 weeks for me) to get the Weber after you order it. I don't know why THD can't make a Hotplate that is usuable for different ohm settings. Seems like a huge ripoff and the technology is just resistors-same as the 10uator.
I can't believe this thread went 4 pages long. I think it's a record for the new forums.