Has anyone successfully done a plastic track replacement on the panorama roof? Mine are worn per BMW and the only solution I can find in forum is to disable the rear most glass panel. My wife loves the functionality of the roof so that is not going to work for me. It's $1,800 to have dealer do it so I would rather do it myself. I am a good mechanic but have not been too good at repairing other sunroofs. Any advise, even sending me to dealer, would be appreciated.

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2005 X5 3.0, Manual Transmission, Black on Black, Sport Suspension, 250,000+ miles and counting, Best SUV I've ever owned