Yeah, they mostly deal with Audi's and BMW's.
I've been friends with Pat for over 20 years so he lets me sit in the car while he does the alignment. If he won't let you sit in the car just ask him to add weight to the driver's seat while he does the alignment. I have not yet had the e92 M3 aligned (the Moton suspension is getting installed tomorrow) so I don't know how sensitive the alignment is to changes in driver's weight but the alignment in my e46 M3 is sensitive to changes in driver's weight.
I don't think he has scales anymore so, unless he borrows them from someone else, he is currently not setup to corner balance a car although he is capable of corner balancing a car.