How to: AF Camper Skylight Replacement (w/pics)

I also purchased a replacement skylight from the same place and was curious that the installation instructions they link to on-line DO NOT show using any screws to hold it down. They only use sealant and Eternabond tape.

Any of you ever done one this way without screws?

I am still waiting for good weather while I decide what method to use but really do appreciate this excellent writeup and pictures.

Terry