kind of a little update, found a deal on a 55 drilled and stand so i had to pick it up. now i need a little help hooking up the overflow. there are two holes, one is 1 11/16" and the other is 1 7/16". does anyone have a pic for reference on how i should hook it up. the bottom is drilled if that helps at all. the next question is advice on the sump. really want a refugium, place for a skimmer. what else should i leave room for? i purchased a 29 G. too big?too small? thanks so much guys!