Those of you with toppers, caps, etc. on your pickups...

I also have a Leer and have not had any leaks. I installed an aftermarket rubber/foam gasket for the tail gate. Depending on how level I park. I may get about a cup of water in at the tail gate where the gasket I installed has a gap. I never get any water when I park level or while my truck if moving down the road. Sometimes we get 3 or 4 inches of rain in a hour and I see no water in my bed.