I also put a sheet metal screw in the baro slightly below max opening position. The shaft does stick occasionally/frequently, so another place for little exercise once a week. It isn't a BMW designed device, but an excellent product for the money. Oh, for any of those who have not placed 3 screws in the baro frame to retain it to the 'T', don't forget that one, either. A puff back will 'send' the baro a few feet in the unlikely event of a big PUFF, like the AHS's sometimes do.
By the way, one of the smartest things you can do today if you own a smart car: DO NOT drive it anywhere! Drive a stake in the front lawn, and tether the damned thing for a few days!