as long as it is a diamond bit hole saw you will be fine just make sure your glass that you are gonna drill is not tempered you can't drill through that. the cheapest place i found the hole saws were on ebay. if you type in diamond hole saw and look for a guy named lau he has about any size bit you need and cheap. mine it a 60mm bit that cost 12.00 all together with shipping from hong kong and only took 5 days to receve it.What exactly do I look for when I look for a hole-bit like yours?
i didn't paint the tank i just used the backing that you can get at the LFS the guy i got the tank from gave it with the tank so i thought i will try it out.what did you use to paint?
it was very hard cause in the beginning i was just gonna make one out of glass but then found out there is no way of painting it to match my back of the tank and won't be toxic. so i am just gonna order mine from http://www.wetdryfilter.com/internal_overflow_boxes.htmalso my BIG question is where are you going to get the intank overflow. i've been looking forever for one of those.
yeah they really do make the holes very nice looking good luckJust ordered one from that guy ...Glad I found this thread. I can now pretty up the holes i made LOL...