I had an issue with my TackTick display getting knocked off the dovetail mount on the aft cabin top in this thread. I ended up drilling holes in the bulkhead immediately above the display and epoxied in a stainless steel sleeve with 1/4" ID that is about 3/4" deep. I set it up so the displays are mounted in the dovetail bracket, then insert a 1/4" diameter x 1.25" quick pin in the stainless sleeve to lock in the display. I've never had a problem since. I don't have to do that on the mast mounted displays, just the aft exterior cabin displays because they are subjected to people banging into them when trimming and launching the spinnaker.