Drambuie,
I should have given a little background. I have been a manufacturing engineer for the last 40+ years. I've either supervised or owned my on machine shop, including for the last 15 years. My shop Merit Machine Inc. had 13 cnc machines, including cnc wire edm, ram edm, deep hole drilling edm, vertical cnc mills, horizontal cnc mills, and numerous cnc lathes. I retired earlier this year. I believe I was pretty specific in noting what was called out by some others who have done this mod. There are no prints. As I noted unless noted all drill depths are to full bore depths when machining. Unfortunately the people writing the modification seemed to be lacking in specifics, so I wondered if anyone else had done this mod and could shed some light on this. If you need to have any work done let me know, even though I sold most of my machines I kept 2 cnc lathes and 2 cnc mills to do some of my fun work. I do appreciate your reply, but really knowledge of machining isn't the problem here.
John