I won't vote, but I will respond.
I'm not sure what you mean by "refresher". Force-fetch is a tool, and as such, you USE it when the need presents itself. I do not consider utilizing force-fetch to correct a dog who say, drops the bird on the line as a "refresher". I am simply using the force-fetch tool in the manner in which it was designed. Drop the bird, I will say "fetch". Fail to pick it up in the manner I desire, and the ear pinch will ensue, forthwith.
With a thoroughly force-fetched dog (and correctly, as in correct FOR THAT DOG), it should NOT be necessary to repeat the force-fetch routine from soup to nuts. That's why forcing is a process, involving several steps and a number of pile-work drills. You can take the properly forced dog and repeat one small segment of the process to more clearly define what is required.
For instance, Omar is a shopper, something which I cannot abide. I like quick pickup and return, no dawdling. Obviously, this was not the case with Omar's previous owner. So, did I "re-force" Omar to teach him the "new" rules? Absolutely not! I simply applied a small-pile drill to teach the dog to not shop. Yes, it involved the forcing process, but was very focused, and he now gets it. It also only took one session. THAT'S the point with force-fetch. Done "correctly", the dog understands the pressure and the "why" behind it, even when the rules change.
Lisa