I got my 180 yesterday and am lookin at how deep the overflow box is and am wondering if I put the in tank half of the bulk head can I tighten the fitting from the bottom with out holding the fitting in the over flow? I am hopeing that the rubber gasket will be enough to hold the fitting snug to tighten from under the tank. If not, I am not sure how to reach down a 30" overflow and tighten the bottom fitting at the same time? I am figuring 2 people if not. due to the size of the tank and shape, its a corner shape and the overlow is in the back corner. please let me know if this can work from the bottom only.