Nice setup, such a bummer that really no one makes some good hubs and the few out there are that style you have and are crazy expensive.
I think I'm going with some of the anker 60w hubs -- I have some batch 1's coming so hopefully I'll get the bugs worked out before Batch 2 units arrive.
Have you taken any temp readings @ 756? -- Anyone know what the desired temp range is for these things?
When I get my setup I'll post up, I recently picked up a FLIR camera as well so hopefully I can do some illustrations of that.