Thanks Andy: I was looking at the picture of your Roo's insides when your post came in. I figured out where the ECU is going. Closer to the receiver than I like but not on top of it though. The propane, solenoids, and pump are going in just in front of the mains. Don't really need to get at that stuff often but if I do I just take the fuel tank out. I should have it done by the weekend then it's glassing time. BTW can you tell me what the dimensions of the UAT are. Thanks Bkf