Thx for your input BlackGrady, you might just be on to something there, I'll try that route if all else fails. I did contact Grady White which informed me that the tank is put in before the floor, etc is put on, they told me it's pretty much impossible, which makes me think there may be a dead end behind the wall you talk about (Now I'm curious) anyways my leak is at the pump fitting it seems the threads on the tank are worn and don't really grab the pump. I'm still tinkering with it, I may try to epoxy a new fitting right into that one, It's just so hard to work there cause unless you have really long arms you're just working with your fingertips, anyways, we'll see how it works out.