For those that are considering,.... RV Flaps are not a precision tool. Mike Seager teaches a two step approach, flaps half when abeam the threshold, full on base. My home field is a tight short field. I typically dump all of my flaps when I am abeam and make a "short approach".
If you need an indicator to do this, or even need to "see" what is going on your not in touch with your airplane.
So, I am definitely in the camp of the KISS principle when it comes to the flaps. However, people like gadgets and will justify their use. Nobody wants to be accused of putting something in that wasn't necessary or useful.
I simply don't find flap operation, as designed by Vans, to be an area of concern under any circumstance that I have encountered.
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.