Hey Hondo,
I installed the top on my TR6 twice (first one got vandalized). I had never done anything like that before and said how hard can it be. Wasn't that tough but was very time consuming. Took me a whole weekend. Measure once, measure twice and then measure again. Remember to do it in the bright sun so that the top material is nice and warm and you get the maximum stretch, even if it is the Sunfast material (which I highly recommend). Also, I used the King Richard automatic snap tool which made the job, well, a snap. I did it by myself, wasn't that bad. Make sure that you use the 3M yellow adhesive, it is in my opinion, the best.
Bill