Brad was the former Manager of Autoscope in Plano. He left and started a shop in McKinney. They are reputable, do great work, and pricing is very reasonable.
They are building race cars, doing maintenance, and pretty much everything in between.
I have been taking my BMW's to Brad for over 5 years and have had nothing but great service.
Be sure to check them out if/when you need anything done. Feel free to PM me if you have any questions.
Disclaimer: I don't work for them or gain any compensation for this, just helping a friend out, and bringing awareness of a new option available to our BMW community.