can someone give me advice on setting up a herbie overflow

[xtreme]

Originally Posted by Myka

The biggest challenge is holding the bit in the right spot while you start it. You always have to start on a bit of an angle too, get it going a bit and slowly get it all th way around..

Grab a little chunk of styrofoam and use your hole saw to cut through it. Then clamp it onto your tank as a template, it'll keep your bit from skipping around. I've done the angle method as well and the template makes it a lot easier.