I was never saying that adjustments can't be made. There is always room for improvement. Mechanics will always need adjustments. To me changing an arm slot (as a general statement) is a pretty major change. I am a believer that everyone has a natural arm slot. A path the arm takes from point A to point B. To change that is a pretty major change. To change posture, length of stride, making sure you stay behind the ball at release, etc. are all adjustments. I don't think arm slot is an adjustment, it is a major change. I think the best coaches take what they have and try to make it better. Trying to rework the whole package is generally not the way to go. JMHO.