Originally had mine behind the passenger seat that I could reach easily. After a few years I realized it might be better if me or the passenger could easily reach it so moved it to between the seats monubted to the front of the electrical flap actuation support angle. mounting it low keeps it from being in the way for your elbow. Of course in a RV-8 it will be different.
Just mounted mine under the flap handle between the seats. It fits nicely there, is within easy reach and out of the way, but I may have to pull one notch of flaps to get it out. Is this an acceptable compromise?