Illegal Set Position???

[KD76]

Rules of MLB say clearly that the pitcher must come set "in front" of his body. I have always understood this to be chin to waist, but would not quarrel over a little high or low if it was a consistent set. We oppose one pitcher who frankly is not all that strong, but he comes set at the very top of the classic stretch - arms fully extended, ball directly over his head. To runners he appears to go home because as his arms come down, his front elbow flexes out toward home. He uses the high set then to generate extra torque on his throw to 1B. He does pause at the top - comes set - but not at all once his hands come down - never anywhere close to in front of his body. Two umpires have now sided with the coach that a pitcher can come set anywhere - including behind his back. Our local head ump disagrees with that (behind the back), but has been unwilling to say that the set position cannot be over the head and must actually be in front of the body. The rationale is that a set above the head might be in front of a vertical plane rising upwards from the center of the body - thus the set is "in front" of the body, even if it is straight above the head. Am I just wrong about this?