It's been a pleasure to work with Callas Rennsport. Since I am out of state the communication has been excellent and was of high importance to me. The diagnostics that they performed were necessary in finding problems that locals could not. Thier knowledge of the Porsche 959 model was invaluable, and I would not hesitate to use them in the future. I Highly recommend them and would like to thank all of the personnel that were involved in doing such a great job.