Well, if that's the case, have a look at KOMA's Strom+ and Strom Passive instead. The active Strom+ supply gives you 1.5A @ +12V, 1A @ -12V, and 1.5A @ 5V, and then the Passive is simply a connector between the KOMA power jumper from the Strom+ and your busboard. So with that, you still only have one P/S generating heat; the skiff with the Passive doesn't have that issue. And then there's price: 2 x Row Power 40 = $310, this KOMA solution = $191. Cost-wise, much more effective.