I am looking at taking the rear panel, which lifts up to check the Alde system, and have heat slots cut in them with a router to circulate the heat better with the sofa back down, in the bed mode. We found that when we were traveling, we used Thermarest mattresses and Travasacks for sleeping, the combination of the two blocked the heating vents in the rear shelf area. We sleep with are heads to the front of the trailer, just for easier access to the bathroom. I think the hot air would circulate out the top panel better, with out the blockage. The slots would be the same thickness and length of the existing slots. What do you think?