Well i did it
 

I bought myself a mastercraft demel and drilled my 20 gal tank for a frag tank or may be a refugium. Haven't decided yet ,but man it was easy.

What are the best bits to buy anyways. The ones that came with the set arent really that good. are there special ones to get the ones that i used are the diamond coated ones i think.

for the price of good bits, i'd just get it professionally drilled :P

i've spent too much on ****ty bits for my dremel.