You could try to do it yourself with the help of youtube.When I was in electronic school back in the early 70's they had us calibrate a tuner and if a 19 year old could do it so could you! I don't remember the procedure but I'm sure I could be walked through it. Its a mater of hooking up a volt meter and turning some little pots inside the tuner until you get the reading you want. It would be nice to learn how if you still use a tuner and if you can't seem to do this after trying you can then have it done by someone.
Just a thought, TISH
Just a thought, TISH