@Earl Grey, I find your explanations here on Xin Yi to be quite enlightening as prior to this forum I had never even heard of this martial art. Is it a newer art or has it just been kept under wraps all this time?
Hidden.
These principles here caught my eye as I've not seen this discussed much...can you elaborate a bit (if possible that is)?
You form intelligent muscle and work with the joints because raw muscle alone isn't strong enough (or intelligent), and this makes sure that these systems work with the fascia.
You won't be able to activate them separately or together without following the proper learning sequence though as the body needs time to develop physically and more time to integrate with the mind and intent each.