Hy blackst yes im know the full tech its by u own knowledgment & research u cant find on the net that , but when u are starting from nothing well on my experience im think study a career its need it some like "electronic engineering" that open my mind to this field to understand the basic from how "works an hdd" ,u can find some interesting links wich "open u mind" to the wonderfull world of "hard drives"

of course that people will be patient u cant got all knowledment on one day, that are many years of study, understanding, and practice, thats not easy solutions, only helps u like a signal " where its the way " thats not its meaning u find a course about how to did a DR and how to be a proof DR company with many years of experience on the net, that´s , like u said cannot be learned only by experience, but its only a "llittle light on the longest way"
Regards