Who's replaced the window channel felt?
 

This is starting to look like one of the suckier things I've done on the car, yet. :)

Is it possible to do it without removing the entire window frame? (ie, snaking it down past the window in place?)

Am I just wasting my time trying?

Try it. Check how far the original passes down past the window edge. Do a dry fit ...no adhesive .....to see how it goes. At worst, you can remove the frame fastenings and just pull it up enough to install the felt without removing it entirely off the glass. You'll then have to align it with the body to fit when the door closes.

Re: Who's replaced the window channel felt?
 

a felt install should be done without the window, IMO. You would want to confirm that no old glue is causing the felt to clamp on the glass. Maybe you could get away with it ? Maybe you will waste your and destroy the new felt? It's an easy install the correct way........Ron

One a Targa have to remove door panel to access mounting hardward for front felt. Best to remove the window to make sure felt is seated in channel.

Re: Who's replaced the window channel felt?
 

I hate to show my ignorance, but is this the stuff on the sides of the window?

Yes. And its much easier, I've just found, to take the door apart to do it.

It took me damn near an hour to slide the rubber outer window seal into the chrome trim piece along the edge of the door. That sucked. A lot. :)

One door down, one to go.