Diddo, I wouldn't hand over a check until I was sure they have had everything set up correctly, and the bow properly tuned. Sometimes things change as strings stretch etc.. I would take it back & have them go through it properly and pay close attention to how they paper tune the bow. Don't be afraaid to ask questions on how or why they are adjusting certain things, then in the future if a problem arises you may be able to put the final touches on a well tuned bow.