Playback Tach's

I just googled summit and can't find it. I'd like to see what it is and how it works. Never even heard of an add on to make a tech play back.
You haven't raced that beak nose beater in over 12 years! How do you expect to keep up with the times if you sit at home and watch the "wild weeds grow". First get the two step in and get it to the track so you can have a reason to play something back? :poke::thumbsup: