Originally posted by pathologymd
When I got my MR-78, the dial would slip when the unit got warm. I sent it to Richard Modafferi for mods, and he applied a wax to the cord. When I got it back, the dial still slipped, and it was discovered that my tuner had a congenital anomaly--one too few wraps around the tuning shaft resulting in too little spring tension. With Modafferi's instructions, I removed most of the cord, rewrapped it properly, and since then so slip. It wasn't very difficult, but I was a little nervous. Mr. Modafferi even told me that he disliked doing dial cords, and when he was at McIntosh, he would send his prototypes to the factory floor for dial cord installation. Those folks could just about do it with their eyes closed. With care, I believe it could easily be a DIY project.
William