Before my girlfriends brother moved out, i picked the lock on his safe. Got to say this must be one of the easiest locks i have ever picked.
I was fortunate that i knew the combination of the safe.
I went onto how stuff works and had a look at Safes.
There is a section on there that briefly explains how to open a safe with a combination. I tried this by reseting the safe and tried using a graph to find out the combination. A very long process and didn't get very far. If anyone has opened a safe using this process of marking the numbers on a graph i would like to know.