I have an RV6A based at Gwinnett LZU and was interested in knowing if anyone in the area might know of an avionics tech that does transponder, encoder and static testing/inspection in this area at a resonable price and can do the work on site without having to remove the equipment from the plane? I have a calibration problem of about 300' or so. Thanks in advance for any assistance that you all might be able to provide to me.