Another thing that comes to mind is since i've already RMA'd 2 of these boards (bios death, defective floppy controller), I wasn't about to do anything permanent that would prevent me from being able to send back this one. Thats doesn't seem to be an issue now as it's been working fine for awhile now, but what I did was spend $8 on a TT Crystal Orb (AS3) that exactly fits the 2 mounting holes in the MB, and use the dreaded thermal tape on a passive HS for the SB. If your A7N8XD has been problem free for some time then go to town with the epoxy, otherwise maybe think about protecting your investment with a less permanent solution.
Just my $.02 worth
elec.tron