stripped allen wrench screws

If the screws are not recessed, and you have replacement screws available, I recommend you buy a Dremel, and with the cut-off wheel attached, carefully cut a flat slice into the top of the screw so you can remove it with a flat-blade screwdriver.

Just hold onto the Dremel for dear life so it doesn't walk off the screw and cut your unit top.

Steve

I've normally have found success without having to go as far some of the above suggestions, even if they are salient.

What I recommend you try first is to switch from metric to SAE or vice versa. More often than not, you can go up a tad in size for the wrench, and get enough of a grip on the bolt to remove it.

Mc,
I'd NEVER want to use a Dremel around my fine electronics. All it'd take was a single metal flake / chip / particle to short between a couple board traces and you'd be .......well, really mad at yourself.

chayro: do you mean 'Torx'?