Are the cut-outs on saddles really effective or just a Marketing ploy? I currently use a Fizik Arione and it's been very tricky getting the settings just right. My gauge on proper setting is numbness and I've been getting it in varying degrees depending on saddle position. I'm looking for a saddle that is consistently numb-free and right now the Selle Italie Prolink with the cutout is high on the list. Has anyone here tried both saddles?