Phil, I think you are doing a great job with Gauge! It's refreshing to see a new trainer take a young pup and turn it in to a fine hunting companion the right way. Unfortunately, for every 1 Phil there are 10 others out there who either don't get a program, don't follow a program, or can't comprehend what's written or viewed and turn it into effective training. Keep up your good work!
I watched a few of your videos and if I may offer a suggestion, if you are not already doing it (didn't see it on the videos), I would start using and would have already been using the one blast "sit" whistle each and every time I commanded "sit". Objective being 1) it will be much easier to get her to the remote sit, 2) she will look at you when you are running the "baseball" or T drills, and 3) when you have advanced to handling and blinds it will not be a hard transition to have her stop and immediately, sit and look back for a cast. When starting to work on handling, I always blow an emphatic "sit" whistle (and sometimes say "hey"), even though they are already sitting, when working a "cast over to the pile" or "cast back to the pile". This ingrains a response to look at you, waiting for a cast. It makes it a little easier if you have them sitting at "the mound", to blow the "sit" whistle, toss the bumper to either 1st, 2nd or 3rd, blow the whistle again then cast. This gives them the anticipation of a retrieve coming after they hear the one blast sit. If you are already past this point in time, sorry for the suggestion. If not, you may want to try it. May be a rough spot or two, but now is the time to start working on the remote sit and start weaning off the verbal. She'll always respond to the verbal.
Hope your season up there is as good as the numbers reports. Sept 15th? What kinda shape are the crops in?