I believe that is a very difficult job.
I considered it a few years back on my Series 80, 7-Passenger DeLuxe Sedan, and then changed my mind after understanding the complexity associated with R&R including adding new Felt in the channel.
Lots of Tiny Screws hold each channel in place, EESCH!
Do you really want to take the doors apart to access the full length of the channel?
Maybe You Do!