I tested my V1 today with Ka Guard On/Off today.
Things I've noticed:
With Ka Guard On and a Ka signal is alerted too, 99% of the time it's an actual LEO.
With Ka Guard Off (forward facing over the hill test) I did get better range, a few hundred feet (only tested once.)
The Ka falses with Ka Guard Off seem to come in sets of two.
Just thought I'd share my personal experience. I'll leave Ka Guard On. I want it to be a legit LEO when a Ka alert comes up.