Enlarging bulkhead hole

[Doug]

Thanks for the great advice guys. I decided that if I need a new bit anyways, to order a 1.75 bit for a new 1in. bulkhead in the back. I also ordered a pair of 1/2 in. bulkheads for the two bottom holes. One will be brought up to a 1 in. stack and drain line as per Steves suggestion. The other to 3/4 in. for my return line.

Sounds good, as long as the second hole drilling goes good. At least this time I will be using a new bit.