Billiardshot,
I had my personnel experience with some of the instruction In the US,
I had a clinic with george ashby , it was ok but a lot of beginners and it didn't work out well!
I had some back then in Europe with Bitalis ,
Le boulanger ( the guy who made from Sanchez a legend) ,
&connesson
couple of clinic over here and there ,& what I like about EUROPE, they have a structured clinic goes deeply into the game and details and relation between the shots ...(it's hard to explain)
The only person that I know who can teach in the united state is BILL SMITH , we talk a lot about the game and he is enthusiastic about the game,he has good logic!
I don't think that US CHAMPION CAN BE A GOOD INSTRUCTOR ( since they are competing,they would tell you little things but not enough )
you need a clear mind people(not selfish) and down to earth , i am sure you know what I mean.
and regarding the USBA, They their own way , we are on a different page , they know everything and they don't like to be tolled !
I respect their opinion, each one has his own believes , time will come and things are going to changed .