Professional and a real expertise of the Porsche air-cooled platform. Recently purchased a 914 from out-of-state, I needed a comprehensive evaluation of the car, Heckmann and Theimann provided just that. They straighten out a few electrical issues, brought the general service of the car up-to-date and provided a list of what the car needs going forward to ensure reliable operation. I picked up the car and it not only sounded better, the drive was much improved. I appreciate the attention to detail and good work.