Quote Originally Posted by billh23
I used a 1/2" drill bit to make the holes, and believe me, buy really really good bits, or at least buy about a half dozen cheaper ones. I bent two from heat, dulled all of them, and broke one.
The secret to drilling a hole that large is to go against your instincts - the drill bit needs to turn slowly. I burned through my first one, 'cause I thought the fastest speed on the drill would help me cut through it. When I bought the second bit, the guy at the hardware store told me to go as slow as possible on the variable speed drill and pour oil over it. (now I tell you! )

Can't offer any suggestions on the clicking noise - that's a strange one!!