John is awesome!
I partnered in a great 182 (N759GL) a year and a half ago, and, with our partner, decided to have John check out and bring up to par our rigging. We had to fly with about a half inch (on the wheel) of left rudder trim to fly straight, and had to use aileron trim to keep the plane from peeling gently off into its own turns. Full disclosure: I am a retired automotive and motorcycle mechanic, and have always prided myself in my own 'anal-ness' when it comes to my work. I stayed and helped with the job, just to get some education into the machine, and, frankly, John made me feel sloppy in comparison.
He replaced every single sheet metal screw he stumbled upon that should have been a machine screw; even installing new nut-serts where the threads were boogered up. The rigging was an exercise in precision and the ends justified the detail John put into it. He also installed flap gap seals, so I'm not sure exactly how much of the resulting speed increase was the seals or the correct rigging, but the plane now flies dead straight, stays solidly in turns, and is so stable that my wife thought I had the autopilot on during our return flight when I kicked back with just a finger on the yoke. Our top speed is up about 6 knots, which is a bit more than just the seals would ordinarily provide, so I KNOW the rigging improved that too.
In short, if you like super accuracy and attention to detail in your doctors, financial planners, or mechanics, John is your man.
John re-rigged my Cessna 172N a year ago, and the difference is noticeable. I have owned N734GR for 8 years and for 7 of those years I have used right rudder to keep the plane on course. After the re-rig, my workload was reduced by half or more. Gone was the left turn, and the sloppy feel. The aircraft flies so well that I am rethinking the installation of an autopilot.
Subsequently, when I added an engine monitor some six months ago, John was the only mechanic I trusted to do the job. He brought the same attention to detail for the monitor installation that I had seen on my re-rig. From clearing out old wiring, to re-running vacuum lines, and setting up the monitor, John went the 'extra-mile'. He found and corrected problems not related to my installation; things he noticed that "weren't right", he made right. When I think of John and the quality of his work, the word that comes to mind is "CRAFTSMAN".
In 2008 we had Monarch main and auxiliary installed in our 1961 182D Skylane. The installation required the wings to be removed and re-installed. Since then I had suspected the aircraft to be somewhat "out of rig". To correct this, we took the airplane to John Efinger. John was highly recommended by the Cessna Pilot's Association. Since it was annual time anyway, John not only rigged the airplane but also completed the annual. John did a fantastic job with the rigging as the airplane now flies perfectly "hands off". John also took extreme pains to ensure that everything was correct during the annual and this included many hours of cleaning under the floor. John pointed out several discrepancies that had been overlooked for many years of maintenance, some of which were serious. I only wish we weren't based so far away from John, but we still plan on using John's services as much as we possibly can. Thanks John.