Yes and the clinics are also worth looking to get an idea of what Mac was teaching at the time (and make the connection with Stack and Tilt for example).
On the Gary McCord video on youtube (Gary McCord talks about Mac O'Grady and MORAD). Any validity that Mac O'Grady helped Homer re-write the Golfing Machine 5 times as mentioned by Gary McCord in his video. Wouldn't mind hearing from Lynn on this one?
I wouldnt recommend the morad system. The yellow book is superior, always. However garya simplifications of what he gleaned from mac arent bad turn tilt turn...thats just golfing machine...