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.

[fishytime]

Originally Posted by xtreme

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.

Thats a great tip Sean....

If you want, have a look at the first couple pages of my tank journal http://www.canreef.com/vbulletin/showthread.php?t=40669 ....theres some fairly detailed pics of my herbie set-up.

[mark]

also take a look at Dez's build, some good pictures there of working with glass.

[megs_clark]

Hi sean thanks for the tip. Im thinking im going to get my other half to do the cutting so am making a list of tips for him. I think he will do a few practic runs and will deffinitly get him to try that. It sounds like thats a tricky part. Getting the bit to stay at first. And Fishytime, great tank. Im only half way through your thread and it looks amazing!

[xtreme]

Another tip is to set the clutch on your drill to a very low setting so if the bit binds up at all the clutch will kick in and hopefully prevent it from cracking. Drilling holes is easy, just take your time and keep the bit wet. Also don't drill to close to the edge, whatever size you are drilling leave at least that much space between the hole and the edge of the glass.

[mark]

drilled a 20g and 33g with a Dremel for 1" bulkheads, took about 15-20min per hole for going slow, packet of diamond bits was ~$10, some to consider also