How 'bout this - I mean he is doing the testing in a pretty cold place already; use it to your advantage!
- bolt the stuff to a big aluminum plate - that battery pack one would be good.
- Set all of it out in the driveway
- Wait 'till about midnight, when it's nutty cold, then start testing. The dT between a worrysome 50*C component and an ambient of -40*C is pretty huge. That alone might work - you won't need much of a heat sink.
If it starts snowing, you may want to stop.
-
- E*clipse