Aqua C EV-120 output height?

[banditpowdercoat]

OK, I think I am settled on gettin a ev-120 for my 45g when I save up a bit more. If I can keep fish alive in the 45g, then I will most likely step up to a 100+G tank so the skimmer will be able to handle future upgrades. But, I am going to be mounting out of sump, so need to know the height I should drill for the 1" bulkhead.
Thx in advance