My sunroof is out of synch w/ motor stops - in other words it stops about an inch short of closure, then have to press button again. Archive research indicates that I need to resynch motor, which for E36s at least simply requires "bumping" motor until roof closes fully, then removing access panel and removing motor, cycling motor to proper stop position, and reinstall. Does this work for E28s? It doesn't seem easy to remove motor, appears you have to remove interior trim panel which I have no clue how to do. Anyone have any tips?