Okay,replacing the window felts and adding the front channel guide.:
If you are adding the front channel, fit it, take it out, put in the window, because if its in you cannot rotate the window when installing it.
Next add your new front channel and leave it a little loose so it can move as your proceed.
Then add your adhesive to the outside edge of the top existing channel and install the felts with the window down.
Raise the window and thru the access hole reach in and press the felts into the existing rear channel and new front channel, if you want to add your adhesive to these do so now, its a tight fit.
I chose to use a piece of duct tape, from the back of the channel on the bottom and wrapped around the sides then into the felt channels.
Finally, after the adhesive sets up you can go back and adjust the window gaps and tighten up everything.
How do I know this? Four hours and two attempts I now have the drivers side done.
Will try the pass side tomorrow, hope it goes smoother.