Firstest - I don't necessarily recommend my felt weatherstrip replacement unless it's necessary. It worked for me & was easy. I didn't even try to order the OEM part first since I assumed it would be very expensive and hard to get. I was a newby at the time & hadn't even heard about Merlin. I'll eventually order the part from him but it's really just for asthetics now since my mod worked well for me.

Second - if you go that route, don't make it complicated. I just cut the weather strip from the vertical section on the front (ends where the track goes from vertical to an angle). Use contact cement or weatherstrip adhesive to bond a layer of felt to the flat surfaces of the track & trim the excess after the glue has dried. I was going to glue in a layer on the bottom of the 'U' where the edge of the glass rides but I had such a mess of glue on my hands that I decided to wait till later & never got back to it - doesn't seem to need it anyway. I also planned to go back & add a second layer of felt to make sure there wasn't any wind noise but I never got back to that either. After I glued the felt in place, I used wooden wedges (shims for installing double hung doors) to hold the felt in place while the glue dried.

Lastest note then I'll shut up - I only did this because I had to. It was cold and wet outside & my window was stuck open due to the bunched & torn weather stripping. The OEM part is a much better option if Merlin can get it for you.