Hi Malocour; Before you head down that road, have you tried contacting RV Glass Solutions in Coburg Oregon? These people specialize in the problem you are having. Might be worth the time to contact them. I was there in 2015 having my fogged drivers side glass replaced and they did fantastic work.
Do not know how closely the cap construction is from a Scepter to an Imperial, but an owner behind me had cracking problems in his 05 Imperial. I got to listen in on the conversation between the owner of the coach and the tech's after the coach was put through tests to see what the problem was and why the cracking problem did no get solved with just new windshields being installed. Found out that in some places in the cap the fiberglass touched the glass and caused stress on the windshield causing it to crack under certain twists in the chassis, improper leveling or leaving a parking lot that had steep differences in grades causing the chassis to twist enough to put a bind on the windshield. In other places in the cap there was too much fiberglass missing and would have to have the cap fixed by adding fiberglass to the windshield opening.
I can't say what happened but RV Glass Solutions gets good reviews by owners with glass problems. I was very happy with their work. Hope this info helps!