After all my experiences with the after market panels, this was a nervous point. Test fit the AMD skin and was pleasantly surprised that with minimal massaging, it fit!
The only problem was that I had no clue what to use for bonding it to the center roof support. Off to Ed's Auto Paint to find out.
We came up with SEM #39977. It's called panel vibration control material. It has about 45 to 60 minutes working time so you can get things all lined up and stays somewhat pliable. It's not the same color but I really don't care as long as it does the job.
After many trial runs at setiing the roof in exactly the right position, I applied the SEM product and carefully set the panel in place once and for all. Here's a shot of the adhesive.