Not sure what you are trying to ask? You don't know how to put it on? or You are asking for different ways to put it on? I have done it with and without the screws, I have a Recon unit too. The Recon I used the screws, the Aegis I did not and I haven't had an issue with either one. As far as excess material, I didn't think there was really that much to worry about. I have also read about people that have used binder clips (about every 6 inches) instead of the trim piece but they had the intentions of removing the cover every year for storage. I have always stored mine with the covers in place and had no issues but I usually do remove my windows for storage at the end of the season. I've had the Recon for 3 years and the Aegis for 2 years and have been happy with both units.