I was not looking forward to changing the targa seal but it really was not that bad.
Lots of silicone grease and a small plastic putty knife so you do not scratch paint.
Removal is easy. For the install I put a lot of the silicone grease in the right door channel and slid one side all the way down then pushed the outside channel in with the putty knife. The top curve of the door seal takes the most work. The top part you extend across the top and hit it in with your palm so the metal part grabs the metal flange of the window. Repeat on the other window side. It is greasy but easy to clean and the new seal is much tighter on the top and looks betterClick to view attachment