Fastback window...save gasket or just cut it?

Hello, I am in the process of planning a remove/replace of my Duster's windshield. From what I have been able to learn so far you never want to reuse a window gasket if you can help it. In fact I have been told to keep at least one spare of everything on hand! I have never done this before but the drill seems to be as follows: 1) carefully preserve the glass as it is removed, 2) completly clean any and all old gasket, 3) adhesive, dirt, RUST!, etc, 3) apply a new coat of adhesive agent, install new gasket, install new glass, 4) finish. Besides, you never know what condition the gasket is going to be in until you get it out. Good luck and keep us posted.

-LY