[Ron61]

That is great if you can calibrate it without dropping the tank. As for the hole, while I had my tank down I measured everything including how wide and long the hole would need to be to make it easy for me top work on the unit and then I cut the hole before putting the tank back up so I could see if I had it correct. Fortunately, and unusual for me, I had it perfect. I also had a drain plug installed in the tank when I had it out as that pumping it out by the input and then refilling it was a pain.

Ron