@Kettlebelephant, I have done the FMS but in no way whatsoever am I a daily practitioner of it, just a bloke who thinks it is a great system for assessing movement.....you may not need correctives at all.....correctives are just that, they correct things. Well the aim is to correct things with the right and appropriate corrective exercise. The score doesn't really reflect that you may or may not need correctives. A balanced set of 2s for the 7 movements will result in a score of 14 and the green light to continue developing strength. You may well score 14 or higher but made up of imbalanced 2/3, 1/3 or 1/2s, some 1s and some 3s.....in which case you may well need some corrective work. Your score of 15-17, could be ok, maybe not so much! The score doesn't mean much on its own, the individual scoring is more the point. If you have done it yourself, are you able to identify any asymmetries? And any 1s? Yes, always better to get some third party eyes but if you know you are a 1 on a certain movement, or you have a clear asymmetry anywhere, then you will know yourself what you may need to work on it. If you are not sure how to go about resolving any known issue, then it maybe cautionary to back off any strength training with a known problem until it is resolved. And certainly if any movement causes pain. Is your score a 15 or 17? Could be any combination of balanced or imbalanced movements at 1, 2 and 3. See what I mean, need the details of the score, not the score itself. And how come it is 15-17? ie a range? If you are in doubt of a score, score lower. Borderline 3 or 2 is a 2, borderline 2 or 1, is a 1. And what is your lowest score and how, if at all, it impacts your other scores? It is very difficult to assess, clearly, on the scoring alone without the details and crucially without actually seeing how you move. Get some eyes on you if you have concerns.
I'm really not experienced enough at all to know all the many correctives with all the many tools and opportunities that they offer to resolve an issue, you know 'it depends'. Some are variants of the same movement, done with a kb or a fixed machine or bodyweight. The point being is if you have a movement dysfunction and adopt a corrective exercise to resolve that dysfunction and the prescribed exercise works, bank it and move on. It is fixed. Consolidate the pattern. And add strength. Job done. And if it doesn't, choose another, with consultation from your trainer/practitioner. There is no point in doing corrective exercise to fix something that doesn't need fixing....and forgive me, I may be misunderstanding your original question.....so if you see someone using a fancy machine apparatus to fix a shoulder mobility problem, that doesn't mean you need to do the same exercise if you have a shoulder problem. So yes, if stuff needs fixing it needn't involve overly specialised machinery. But some people may well benefit from that approach if deemed to be appropriate and available for them. Equally, a kb, a stick, or the floor may do the same thing, for better or worse.....Hope that may help, or reassure in a small way.