Had a look this afternoon and struggled to get the vent off. The metal tangs seemed to be too long and i couldnt get the screwdriver into them. Made a wee tool with an old coathanger and it came out first time. Anyone else doing it should note that the white electrical connector block for the screen is secured to a bracket below the radio and needs a quarter turn anticlockwise to release it. After I got it out, there are 2 torx screws holding the motor on. Took them out and the motor slides off a retaining post. Another 3 torx screws secure the gear "housing". Took them out and applied a small amount of grease to them before puting it back together. There is nothing that will just fall out or ping away. The other pivot point is just a plastic collet that is pushed in to form the axis. This was dry and a bit dirtier with plastic "dust" due to use with no lubricant. Take out a torx screw and the collet prises out. Cleaned it up together with it mating surface in the housing and applied some grease. Put it all back in the car and tested it about 20-30 times and it opened and closed completely every time. Very happy with the result and dont see any reason why that isnt it fixed. Time will tell. Thanks for the help.