[JerryL]

On the corners, search here, there is a great thread on the install and a tool to make from a cabinet / door shim (the thin wooden tapered shims about 1.5" wide) you sand the thin end to a generous radius (about full to the width of shim) also thin it a touch and sand it smooth.
You place it under the rubber and parallel to the glass and use the rubber mallet to form your corners up into where they fit you shape the trim a bit.
I also shaped a chop stick to aid pulling small areas of the outer lip into place.

Was a job I dreaded but went very smooth.

That thread helped me do my 71 a couple months ago, came out great and was genuine Porsche seal,

Regards