Just as an insurance policy, put a metal rod down the rr hole before you drill. This will deflect the lock bolt drills away from the rr hole.
You gots to be careful that the hole in the toe of the lock doesn't end up too high, breaking out the side of the lockplate, eh.
I thought I'd try my Canadian accent,eh, because there are so many darn Canadians on the board now, eh. Must mean it's a good board. They make it better. Ever notice how many good songs come out of Canada?
Oh, sorry, off topic.
Acer