On 2011-02-09, Karl Townsend wrote:
...
I was thinking, right or wrong, that drilling "through" the tube would
not get enough coolant to the bottom. So I wanted to do it by drilling
all holes on one side, then flipping the piece in the vise and
drilling all holes in the other side.

do it this way and watch all your holes not line up. BTDT

Karl

I did a couple of 5/8" holes for a hitch adaptor, and they did line
up.

i