Knowing where you are located might be helpful in giving people a better idea of recommending a trainer or clinic locations.
Stacy Scott and Peter Hall (Maggie's Farm) hold a Jack Knox clinic once or twice a year (that's probably the one you just missed, I'm guessing).
Kathy Knox used to do two clinics a year at Chestertown MD at Sarah Ruckelshaus' Victory farm, one in December and one in April. Even if you could not get into one at this time, auditing might be an option, or being put on a waiting list.
Patrick Shanahan does more than one a year in eastern MD, either with Linda Tesdahl or one of the other handlers in that area. One of the handlers that frequents those clinics is a member here.
Someone earlier on mentioned that even though your current trainer might be a good handler/trainer, that doesn't mean that his/her approach to training is a good match for your dog and you. I know this can be true because one of my dogs spent five months with a very competent handler and it was largely wasted time and money - not every handler works well with every kind of dog.
There are some really good trainers in the MD/VA area who either give lessons and/or take in dogs for training. That might be an option for you, trying a different trainer and trying someone who will take your dog in for training. If that trainer is honest with you, you won't be wasting your time or money because he/she will let you know in short order if the dog is not going to make reasonable progress with them.
The marvelous thing about supremely competent and experienced handlers/trainers like Alasdair MacRae, Jack and Kathy Knox, Patrick Shanahan, and the like, is that they have the level of broad experience with many, many different dogs (and sheep and facilities) to generally be able to make a very positive difference in almost any dog with potential. This is not always the case with every handler/trainer.
Apparently I just missed an opportunity for a Jack Knox Clinic in VA. Darn it! As far as don't take him to just anybody [because trying to 'screw him down' is only going to backfire], where do I go?
Sue Rayburn - Cleverly disguised as a responsible adult, but not the brightest firefly in the jar.
Celt, Megan, and Dan
"When the chips are down, watch where you step."
"The happiest people don't necessarily have the best of everything. They just make the best of everything." - author unknown