Duster window help

A cross section or profile view of the gasket looks like 'H' . Well that's as close as a font will draw it. Anyway the glass and fence are supposed to be the same plane and the gasket marries the two. I have used various tools ( pliers, hammers, and even grinder ) to improve what was acceptable for factory workers. Like part edges not lining up just right leaving steps in the lines. I really do want the edge of the fence to match the edge of the glass. Maybe I am a perfectionist and all the extra effort is overkill. I don't have leaks.