More than just at a superficial level? What was tried, for what reason, did it work, if not why, what happened then, why features/techniques today are what they are, etc. Are there any particularly good articles, posts worth reading that can either help me develop a better understanding of all the relevant background, or are just fun to read? Thanks!
The only major 'error' I see with modern sidemount divers/instructors stems from a lack of education about the evolution of sidemount. Where they buy 'off-the-shelf' systems without understanding how, or why, those features evolved....and what they are intended for.