I know folks say "lot's of lube" and "have the tracks loose" which I tried, but before I even got that far, the entry gap is off by almost a CM and had me stuck. I tried to wedge the gap wider by hand as I was shoving the glass in there, but started to hear cracking.

The window with slider is almost 3.5 including the retaining boss on the other side.

The gap between the two door panels is only 2.5
So, how to fit a 3++ into 2.5?
Thanks for any advice

