@Eco
My A1200t has an internal flixer made by DCE I go everywhere with that stupid bugger and it has never come off. The cards in the Mediator pop out a little. If I hit some really major Potholes.
But if yours comes loose the only suggestion I can think of is a little hot glue tacked in the corners. The blizppc is another matter altogether over the years I have tried different things the easiest and works rather well. took a small platic clamp drilled a hole in it and mounted it with a screw on a standoff on the mounting hole by the accelerator. the clamp then holds my accellerator. On my Dream and Gear cases the clearance is so little once your put the top on with a mediator a small piece of soft rubber included wedges that sucker real good.
also I use a really sweet pair of straps from CaseAce that makes carrying around my tower case easy I also have their straps for my monitors I used to use their monitor stap with my 1764. I now however use thier LCD monitor holder with my 19 inch LCD. saves the back big time compared to a 21" CRT.
Kgrach