Consider a clinic by Phil Ross/Joe Dillard particularly if you are on the West Coast/Western States. Their home club is at Redlands, California. Both shooters are highly accomplished (both have grand slams under their belts) and have been shooting a long, long time.
You can look up Phil's accomplishments as a shooter at the California Golden State Trapshooters Assoc. website under Hall of Fame. One year, Joe was the Georgia State singles champion for the year..
Phil has shot longer than almost anybody, he is a veteran, not yet a senior vet., but has shot IN seven decades going back to the 50's. In fact, I think he won something (again, three days ago) at a league shoot from the 27.
Both are "The Old Masters" as Ed Pink is to hot rodding/engine building. Joe is a relative youngster and, I believe, not yet a veteran.