I have just finished fitting new winder mechanism's and window channel felt to both doors on my TR8.
Not a difficult job, just fiddly and you need to remember to undo the channel guides front and rear to give you some play with the glass, what a difference its made windows now gliding up and down, perfect.
A job well worth doing.
Steve
1983 Del lines TR8. FIAT 131 Abarth Replica. 1996 BMW Z3, 1960 Mini Hustler. 2009 Sport Ka, 2012 Ford Fusion.