Aha, thank you. I have no interest changing him to a SM, far from it (my only solid allways starting SB). Only wondering if I can play him in the wings for a 3-4-3 (or 3-5-2), and as I originally thought, I can play him there.
Basically the question should have been if ONLY SMs can play to the wings of a 3-4-3. And apparently not, thats not the case. Nice to know one can play 3 CMs too, forgot that for some reason.
Anyway, here's an early lineup who I will probably tweak later: