well i already tried that, and one said something that big would run like 30 somehow..the other said 8, but they guaranteed that it would probably break because how thin it was...its only a 5.5 gallon, so it is thinner...but i dont know how much thinner it is than a 10gallon...and ive drilled a 10...but i just dont know how to do a nice even circle...like mr acrylic has done.
what i dont understand is taking those small bits and making big holes like 2in.....do you just work the hole bigger and bigger by hand with the dremel? and once you get it close to the size....? how do ya make it smooth so its not a crazy hole, or maybe it doesnt have to be perfect for a bulkhead? i shall try starting it soon....i've made cuts before, but i was doing a square to try and connect tanks...then i put to much pressure on it and crackkkkkk, oops. but my lines were anything BUT straight.