Originally Posted by Gnome
Go to H Depot and get a paper thin cut off wheel for your grinder. It will cut 1/16" slots, wort clears in a quart or two.
Actually, I was just at Home Depot yesterday buying stuff for a room I'm finishing up. I also got another 1/2" copper tube. Looked at the cut off wheels and the thinnest they had was 1mm, which I'm pretty sure is what I used the first go around. Maybe I was making the slot wider by not holding the grinder still?