Instead of drilling, why not by a security bit set from Harbor Freight. There is the perfect sized bit in the set to remove the locks. Just a suggestion, that way if you are just looking at a machine, before you buy it, you can open it without damaging anything(remember to check the pcb's when its open) and you can put it back if you find some damage. http://www.harborfreight.com/33-pc-security-bit-set-68459.html