Just to Pile on...After using a handful of different Chronos and owning two (PACT and CED) the CED is the hands down winner. The readings are consistent through a wide range of light conditions.
I bought the IR kit for mine at the same time that I bought the Chrono and have only used it to make sure it works. This unit is less light sensitive than any of the others I have tried.
The next thing on tap for mine is to fashion some plexiglass shields for the sensors so I don't kill them with sabots from a muzzelloader or Gas Checks from lead bullets.
"My greatest fear is that after my demise my wife will sell my guns for the price I told her I paid for them"
-don't know where it came from...but true