What is the accuracy of your gun, in say Arizona Sunshine, comparing 3 sensors to 4 sensors>

+sensors = more consistency && +sensors != more accuracy

I guess.

I am asking someone who has tried.. that is all.

There should be no difference in the normal case (i.e. if you are in the center of your space and visible to at least 2 sensors). The advantage of 3 or 4 sensors is that they avoid occlusion (i.e. if your body is blocking a sensor) or if your space is really big and you are too far from the 1st or 2nd sensor.

Fair enough.