I have over 6,000 aggregate hours in 5 homebuilts. Each has one Slick and one LSE Klausinator. If a Bendix mag would have fit, there would have been one Bendix and one LSE on each plane.
My criteria: 1) I shouldn't fall out of the sky 2) The plane shouldn't leave me stranded on the ground somewhere god forsaken, and 3) I can always launch when I want/need to.
One EI get me 90+% the benefits of having two EI's, but maximizes 1, 2, and 3 above.