Bro and I call our chronographs, "Lie Detectors".

Bought my first, a Model 12 Oehler in 1977. I've had a chronograph ever since. Used the Oehler until about '82 or .83, then bought a Pact Timer- still have that one and check my Chrony Beta master with it. They are usually within 5fps, whcih is amazing for a chronograph that's screens are so close (chrony). I've always used the 4' spacing on the Pact.