I bought a new house and has a pool. Pool is 15000 Gallons, has Hayward DE filter 60sqft. The guy who came to check the filter seemed to be in a hurry and while taking apart the grids broke two of them. I thought its much better to do it myself and cleaned the grids and put them back. When putting back the grid assembly inside the filter housing and closing, I noticed that the top lid doesnt really close on the base and just slides around sitting on the big o ring. I tried to close the lid and tighten the belt with the two bolts on both edges, but it seems like a bit of a struggle to do that and it still seems not properly seated on the base. I dont want the lid to fly and land in my neighbors yard when I switch on the pump and pressure builds up. Am I doing something wrong? Or is it just that I need to keep tightening the bolts and the lid will squeeze the o ring and will come closer to the base and fit properly? Thanks for reading this. I couldn't search the forum if someone else already faced this issue and has been addresses here, since I dont seem to have the privilege to search in the forum. Hopefully I will be in the near future.