In this blog post the author makes a convincing case for teaching/studying the cardinal vowel quadrilateral in language learning. Apparently it's taught to actors and in some advanced language courses to improve the accent.
It kind of make sense since when learning physical activities, most people first watch someone else performing the activity, then visualize him- or herself repeating those movements until they are able to perform those automatically.
On the other hand, when learning by ear, the brain pick the vowels and consonants in the mother tongue that are closer to those in the foreign language, instead of alerting that those are really different phonemes. That's why we keep the accent from the mother tongue.
So, I would like to move a step closer to how we learn physical activities and learn from actual x-ray or MRI images the phonemes in a foreign language even when my brain is not able to distinguish them from those in my mother tongue.
Is this way of learning generally recommended?
If so where can I find material to learn in that way?