if u do it your self its going to be more lateral to medial... as u said u just reach further back... and come in on an angle, wat id call 45 degrees....
i use a 1 1/4 inch 23g pin ... no probs... ever.
has brought up my rear delts heaps... i know people say theres no such thing as site growth... but its worked for me...
I may have to try that next :thumbsup: