GT Screen Fitting
From top to bottom: Plastic body-filler spreaders to lift the edges of the seal and hardboard (or similar) to push the seal over the top of the glass from the inside; locking-strip fitting tool; ball-end tool for the trim.

There are two sizes of the ball-end tool, as far as I can see the shorter one is easier to manipulate, and this still from this Moss video at 13 minutes shows one shorter still:

Hole punch for the original HRW wires to go through the seal

Gap between trim and seal at the upper corners of the rear screen