I've been trying to lockdown issues with my tach and curious for input. Long story short, a few months ago, the analog tach on my Grumman Tiger took a dump and I needed to replace. I didn't (and still don't) wanna go the digital tach route. After my mechanic installed a new Mitchell analog tach, it seemed to be reading lower than in the past. I verified with a handheld digital tach reader that the new tach was indeed reading between 100-150 RPM too low. We have since tried a few things, the latest being replacing the old tach cable. It still reads 100 RPM low (compared to the handheld digital tach). The next step would be to send the "new" tach into Mitchell for them to have a look. I know an analog tach isn't perfectly accurate, but do you guys think it's worth sending it in to Mitchell? Should I just live with it in its current state knowing it reads about 100 too low? For the time being, I still don't want to switch to a digital tach. I might do so down the road with a JPI 900 or Garmin 275, but for now I wanna stay analog. What say you?