As I said before,, I spent ALOT of time researching this topic. My Friend Ray made this set of Diana blocks for me,, Ray spent WAY MORE time than I did doing research pertaning to this & made what I knew he would,, THE BEST. PERIOD. Seriously Folks,, I doubt NASA could do any better. Matter of fact,, our other Buddy,, a tuner we know in Las Vegas,, (Like Ed K.,, no longer tuning for gen. public) Has NASA ties. In the mean time,, since my Friend CDT, (Mr. Bob) has retired,, I can only recomend one tuner I know,, only cause I trust him. That would be John in PA. Ray makes parts for him. Course,,,,, Im guessing I could maybe get Mr. Bob to work his "Majic" just one more time for me??He He!! Retired?? Maybe so,,Bet he made need his kitchen remodeled someday?? New deck?? Some type of home renovation or repairs?? Read it & weep Folks,, bet I can still get a Tune from the MASTER!!!!!!! Tim.