I'll bet he's dying to play with your carbs. No! I won't let a shop even change my tires. It's a minor pia, but I don't have to worry about getting my wheels all dinged up by some hacker that could care less about what he's doing. Like get a wheel lined with weights because the tire didn't get positioned right on the wheel. "Just say no" Do everything you can yourself, and ask for help if you need it.