I recently installed a new Sierra Top A5 acoustic version after accidentally breaking the glass out of mine.
It is a pretty straightforward deal. One point I would like to make about doing the job is removing the two side plastic parts on each side where the tension cable mount to the pivot point with the old top and installing them on the new top with the new top on a bench instead of doing it with the top on the car. Everybody I have talked to and videos I have watched seems to struggle with these two parts. I did have to replace one and buy a couple of new rivets as mine were gone/broken but doing it out of the car made is so easy. When removing the parts you will need to remove the plastic rivets holding them together.
The best video I have found for this is in Spanish, which I speak, but even if you don't understand Spanish, you will get the gist of what I am talking about at minute mark 36:55.
https://www.youtube.com/watch?v=DiWuXla8_oQ