[bigben2k]

Originally posted by Puzzdre
I know what you mean, on the second block (with the second drill bit ) I managed to drill one full row of holes, than decided not to do what BB2K said (one row is enough), started second row and - snapped the bit.

Now don't you wish you had listened to me?

Actually, I found out that 2 rows is good, but 3 and more is almost completely useless.