Shower Skylight install Idea - Opinions wanted - Henry 887HS

I think that the skylight manufacturers put screw holes in the skylight flange for a reason. I would be hesitant to just rely on adhesive alone to hold the skylight in place. A lot of heat on the roof could cause the adhesive to soften and lose strength. When I replaced the skylight in my fiver, I used screws that had an integral washer on the head to lessen the stress on the plastic, setting the skylight on a bed of butyl tape. No leaks so far, and we've had a few big thunderstorms since the skylight was installed.