The power unit taking up more space is a concern for me. If the non-powered model takes up signitficantly less space I'd go with that instead. I just dont know if having a rolling cover will be an issue if it has a layer of ice on it. I don't want to be in a position where I cant open it. I'm leaning more towards the bakflip vp because of that concern. The issue I have with the bakflip vp is that it seems that any time I open my tail gate, I'd have to open the rear panel of the cover to close the gate. that extra step could be come a pain after doing it so many times a day. I like your transformer idea. Kind of like putting an electric fence around the truck. lol That would definitely do the trick.