Whats the current consensus on the ideal body position for downhill racing in terms of aerodynamics, weight distribution, and bike handling? Specifically, how do professional downhill riders optimize their position to improve speed, control, and overall performance on technical courses. Is there a general agreement on the optimal saddle height, handlebar height, and body angle, or does it ultimately come down to individual rider preference and bike setup. Are there any recent studies or research that provide insights into the most efficient body position for downhill racing, and how do these findings translate to real-world racing applications?