yup, that rapid clicking noise is the metal screw on the motor trying to grip the plastic gear that is stripped. nothing to do with the track. i took mine apart the other day and it is very simple. the plastic gear inside the motor had a nice little groove in it that is not supposed to be there. this whole thing is ridiculous. there was supposed to be a group buy but it was at an outrageous cost. i have had a couple people tell me to take it to a machine shop and have them fabricate one. it might cost a gizzillion dollars, so i might just get a quote out of curiousity one day. other than that, all you can do as of now is buy a new motor.....

sunroofs are great and all, but i really don't need it during 100 degree CA weather right now anyway. strangely, i prefer more use out of my sunroof during winter ( not raining of course).