I have an 2011 Edge M21. I took out the antenna socket and peered with mirror and flashlight. It looked like 1/2" chipboard between the 2x2 studs, this didn't look like something I wanted to screw a mount into. I used an arm mount on a 20" flatscreen screwed into one of the studs and have a screw hook under the cabinet that I hook a bungee to and around tv when traveling to prevent motion. The studs aren't centered, but with an arm type swivel mount, it works out OK. I only have about 3,000 miles on the TT, but so far it seems to be holding up.