So I was wondering, I will be building a 36 x 42" tank, and will be building a custom stand into the room that I jut finished sheetrocking. The plan was to have 3 holes drilled into the bottom on the center of the 36" side. The holes are 1.77" for 1 inch bulkheads. But they look like the edge of the bulkhead will be about an inch from the edge of the glass. With a 2x4 being 1.5 inches wide, what is the norm? Move the holes in further towards the center of the tank? Or do you frame around the opening holes? Or do you notch into the 2x4s?