Who's running a setup like this? Slides are nice, but I'm looking for a no-drill solution. I've got a LINE-X spray-in liner in the back of my 5.5' F-150, and I have a rubber mat over that. The mat is grippy and I doubt a fridge would move around on it much, but I want to secure it. I've seen people attach D-rings to the bed bolts and use those as tie-down points, but the mat covers the bolts so that won't work. I guess I could always just pack the bed tight so there's little if any room for movement. Thoughts?