ive got a timber ridge liberty safe (made by liberty for gander mountain) its got a mechanical S&G lock. my wife just doesnt get how to use the lock *sigh* i prefer the mechanical type but i need her able to get in the safe too. im looking at getting a S&G 6120 lock with a biometric keypad. how hard is it, if anyone knows, to change from mechanical to electronic?? i can call a locksmith prolly the easiest thing but i prefer to diy. anyone have experience with such things??