Tube Amp Repair

Hello all, anybody know of a good reputable repair shop in the Dallas, Tx. area?
I have used Frank Mufich Audio in McKinney Texas to repair an audio research vt 100 mkIII and a threshold s150. He did well on both.
Hey Docdan50 thanks for your recommendation! Just spoke with Frank today and what a great conversation we had. When I move to the Dallas area I will be taking my amp to him. Thanks again