Do you guys have any tips to stops leaks at the union after cleaning the Intellichlor unit. I always get a leak on the same end and it takes me five or six tries of dissembling and reassembling until I get it right but this time I've spent nearly 3 hours and can't get it to fit properly. I checked for cracks or cross thread and can't see anything wrong with it. I notice that that end doesn't thread as smoothly as the other one, I suspect the unit is slightly unleveled. So any tips before I call the pros?