Well, GOOD LUCK !!!
Dunno if you already did, but look at these threads...
http://forums.procooling.com/vbb/sho...?threadid=4490
and
http://forums.procooling.com/vbb/sho...?threadid=4451
You'll find a lot of good info...
just, take it from me...when you think you're going down slow with the drill bit...it's still way too fast...
good luck, again!!!