928 window scrapers installation nigthtmare

[Cheaptools]

Having issues with installing these window scrappers/seals on my 82 928. The scrapper has a nipple that slides into the upper groove in the door. The lower is easy enough but no matter how much I lube up these things I cant seem to squeeze it into the upper groove. Checked RennList on this --no direction there either. I'm beginning to think that taking the door apart and yanking the glass is the only way. I have a 10 bill for anyone that can show me the light...Thanks