Oh yeah, I forgot about that. Cleat position makes a huge difference. (Un)Fortunately for me, my feet start hurting a hell of a lot more and sooner if my cleat is (or has slipped) ever so slightly in its position. But yeah, a lot of us are not symmetrical by any means and need to treat the left and right side different, and things like shims and differing cleat placement for each foot remedy that imperfection.