Hello Martin, somewhere is a thread on how warm do your amps run, perhaps someone will chime in with the thread link, or search it. As I recall, no reports of hot systems, or even too warm to touch. I used inexpensive small diameter PVC pipe, 1 inch height, from the hardware store at one tome but no longer, the amps never were more than warm to touch. And, welcome, post some pics when you get a chance.