I work at tune up plus in newport news. IthinkI1 is right there is not that many good A\C people out there. If he pulled a vacuum on the high and the low side and it did not leak down there might not be a leak. there might me something else wrong. Cause if you filled it up and by the end of the day its all gone then there is a big enough leak that you will find it when you pull a vacuum on it. Look I will talk to my manager tomorrow and tell him the deal. We have a good A\c man at are shop. I Pretty sure that I can get my manager to look at it for free and tell you what is wrong with it. Sense you have already spent $125 at one of the other stores. I will let you know tomorrow what is up.