dont all sharpeners sharpen by removing steel?I think your requirements kind of eliminated most of the options out there. I don't think they really make a compact, light, versatile, idiot-proof system that sharpens without removing a lot of steel. The Sharpmaker suggested was probably the closest to what you are looking for. Any good system will take a little practice with though.
The tiny pull through sharpeners are cheap and functional, but they sharpen by scraping steel off the edge.