When I refer to the cutout, I mean the cut line on the bottom of the wings and stabs that frees the control surfaces.

I have only built the airplanes for other people, I don't own any Integrals. I do fly a similar design, the Partner, and I've always run dual elevator servos in those. I think Carl Veit has an Integral flying with a DEPS system or something similar, however I can't comment on how much difference it may have made. I've never had a problem with dual elevator servos, and prefer that setup. Different strokes for different folks, I suppose.