Thanks Carl.
Greg, if you do decide that it is new top time, do it yourself ( with a helper ), not hard to do, and for once the manual is spot-on with the instructions.
At least you will know it is done right, take the time to put some silicone or otherwise lubricant in all the pivot joints when the fabric is off.
All you need is :
1. a good drill and sharp bit to drill the rivet heads off.
2. a shop-vac to hold next to the rivet head as you drill.
3. a cheapo pop rivet gun.
4. a magnet tool or grabber to get the drilled rivets that get away ( trust me, it's gonna happen )
Hint: I did mine in my garage and was able to tie the open tonneau cover to one of the overhead garage door tracks.
You can't prop it with a broomstick, that gets in the way.
Another tool needed is some channel lock pliers to tighten up the "U" channels where the side gaskets were removed, otherwise they won't stay in.
The channels get expanded when you remove the side window gaskets.
Also make certain you have the new top PERFECTLY centered on the rear bow before applying the little clips.

If you want to be really thorough, this is a good opportunity to remove the 7 hydraulic cylinders and send them to Klaus for overhaul.

This concludes "top replacement 101"