Can be made to fit a ProChrono.
You have to take a 3/16" drill bit and drill out the support holes in the plastic of the light bars.
The invisible light seems to do the trick.
I got a rubber band to register the 95 fps in a fairly dark room with no overhead light at all.
Now to head out to the indoor range (which has florescent lighting).
And, yeah, that's my wife's section of the library.
Caldwell infrared light screens
Linear Mode
