Need advice on fixing rear sun-shade

[Crash513]

Right rear roll-up sunshade on my X is not retracting down into the passenger door all the way. It will resist pulling up the top 1/2 of the height of the window, but does not resist or retract back more than that amount. I'm under warranty, but before taking it to the dealer, I'd like to pop the necessary panels off and see if I can fix it myself.

Questions:

1. Has anyone ever removed the necessary panels/pieces to inspect or remove their shade?
2. What is inovled in this? What panels/pieces must be removed, and how (what's screwed on, what pries or slides off)
3. Has anyone ever had this symptom and been able to fix it with or without replacing the rollshade?

Any advice based on experience would be much appreciated. Thanks all in advance for your consideration.

Regards,

Crash