In your honest opinion, when does "muscle memory" begin to solidify in a student?

I'm of the opinion that it begins to solidify in a student when that student is no longer struggling with any given technique(s).

Should a time table be placed on any given technique(s) related to muscle memory?

Tuning up a technique(s) in the search for 'perfection', does this mean that the muscles have amnesia?

I look forward to your thoughts/comments!!

I think times vary greatly from one individual to the next. It takes me a long time to learn new things.

I would agree with your assessment of what muscle memory is. Now as to the degree of mastery or proficiency, that is another thing. I can have muscle memory of an improper technique just as much as I can of a correct one. When this happens we have to retrain our bodys, a fairly difficult process. Which is why I am a proponent of teaching a technique in its entirety, with all of the nitty gritty details.

I agree that everyone will learn at a different pace. There are naturally athletes out there that will pick things up quick, and there are those who are much more raw, and will require more time to ingrain things into muscle memory. Reps, reps, and more reps will be the call of the day, but, they have to be proper reps, and add speed and little things here and there as time goes by, when they feel they are gaining levels of comfort.

That's my take, anyways. Hope that answers the question well enough.