I'm sure the manager can make the adjustment and in my opinion it's worth the extra money to have an expert check the alignment as well as advising of any parts that will need replacement in the not too distant future. The one I go to has no problem with my doing the part(s) replacement and bringing the truck in for an alignment check/adjustment. I always give the tech a tip as that makes the reception I get pretty nice. On top of the value of knowing that my truck is in good condition you rarely know you need an alignment until your tires are badly worn and they are getting damned expensive lately.