For anyone who has an engel fridge in their truck, maybe you can help me out a little. I recently installed an engel MT45 in my Tacoma behind the driver's seat in my extra-cab. I have it placed on a 12x24 inch piece of oak, and fastened with 4 turnbuckles (2 to seatbelt hooks, 2 to a piece of aluminum bolted to the floor). It's in there nice and tight. However, when I hit bumps, sometimes there is a loud CLUNK from the fridge like the motor is bouncing around. Anyone have any experience with these fridges, and how quiet they can be if secured other ways? Thanks for your help.