Here is the sequence that I used to get all of these pieces installed. It worked well for me.
1. VIN tag
2. A-pillar chrome trim with butyl
3. Seal that goes along the top of the windshield frame and down the A-pillars
4. Center alignment post for targa top (2 screws hold it in place)
5. Top interior trim picece that the visors mount to
6. A-pillar interior covers
7. lower seal that covers from a-pillar to a-pillar
It was a little challenging getting the small screws installed through the flap of vinyl that comes off of the top of the a-pillar covers and into the windshield frame. But the seal "corners" can be pulled back enough after it is completely installed to allow for access to drive the screws into the windshield frame.
Glad to have a few more parts installed