I also had a new roof/window fitted, black mohair with pockets, local chap did it all in for £500. Seems fine, but had to adjust locks as it was much tighter that the old one, told it will stretch in time so need to adjust to keep it a tight fit, easy to do those, just a small allen key needed to loosen and few turns of the locking clips then tighten back up. Looks smart and goes with rest of car when up, clear window at rear is fantastic, big difference to look of the car, for sure!
