https://www.dutchmen.com/product/coleman-lantern
https://www.keystonerv.com/brands/
Above are links to the websites of both Dutchmen and Keystone. Note that Coleman is part of the Dutchmen line and not Keystone. The parent company/corporation of both is Thor. The Coleman line does not intersect anywhere with Keystone. I'm confused why the dealership would advise you to do that. To me it appears it would only complicate matters. If it were me I would be asking for an explanation from the dealership. You may be running in circles.
I will say that "raised screws" will not be considered from my experience. The aren't considered a problem, only cosmetic, until they pierce the membrane. I have about 8 on mine that wanted to be "ornery" so I just cut some pieces of Eternabond tape and placed over them. If they pierce the roof membrane they still have to get through the Eternabond.
