Okay, so I know it says 1" hole for the fillport, or 2.54cm (obv). However, I am doing this on a case panel that is already anodized and would like to preserve the finish. I realize thats impossible when cutting a hole, however if I were to say use a 7/8" Unibit to cut a hole into the case, and did it from the inside (going to be covered with foam anyhow) of the panel, would the fillport manage through that hole? if not any pointers on a good hole saw to use on aluminum? I don't want to mar it up too bad...