Hi Jacob,
The only difference between KFLOP Rev 1.2 and the current KFLOP Rev 1.3 is additional noise filtering on the KFLOP Reset input. With long cables and signal cross talk or in a noisy evironment could sometimes cause KFLOP to reset. Otherwise they are identical.
Here is a post showing a method of adding a 0.001uF Ceramic Capacitor near KFLOP to make is the same as a Rev 1.3 board.
https://www.cnczone.com/forums/dynom...ml#post1661110
HTH