WOW. I needed a helper. Whether a poor manufacture, or whatever, the gasket kept sliding off one end or the other. Then, it seemed buckled in two locations. Sort of crimped up along two edges.
Once in, the gymnastics to push it down and in were a bit crazy. I’d like to add a sound file of the grunts.
It finally seemed to go in when I hit it with my purse

.
Seriously, the rope helped a ton, but no matter how hard we tried to avoid problems, we got hung up at each upper corner and the rope tore the gasket a bit up in each corner. Darn.
It just got snagged, and I think it was my fault because of the angle of my pull. When I pulled straight down, instead of toward me, it finally gave. The two tears are tiny and almost invisible.
Anyway, that’s my update. Patience, four hands, an understanding of the realities of new manufacture, old cars, and old people helps make the process easier.
Thanks all—
PS That finishing bead was no day in the park either. It took two hours to fit it while avoiding pop-outs. We used padded Stanley vice clamps (each side of the windshield) to press the bead into the slot. A rubber hammer was not effective.