
After taking out the entire drive mechanism I've now realised that the window is fouling in it's runners somehow.
I've had a good look and the only answer I can think of is that the actual metal frame section on the lock side is bent although there is nothing obvious to see.
The runner on the quarter light side seems to have plenty of free movement but the lock side seems to be the issue. After the window lowers aboout 12" it then really struggles the entire rest of the way.
Anyone had a similar issue?
Thanks