Here is my problem... I need to remove 4 schedule 80 1.5" bulkheads. Unfortunately, they are mounted backwards, with the gasket on the dry side and the nuts inside the overflow boxes. I had a very strong person try to turn the nuts by hand, and they are not budging. I cant think of a tool that will fit in the overflow box to get some leverage. I considered trying to cut the nuts off, but they are flush against the glass and I worry about damaging the tank surface. Here is a picture of the situation. Any suggestions?