I hear fear in your words. If I'm wrong ignore the rest.
How can clearing a blockage and returning to a more natural state be bad?
... "open something uncontrolable". Are you in control? Are you not asking your Master to direct your qi and your development for your own betterment?
... "best forgot". You ask for the guidance you need, and accept what you receive with gratitude.
Working on other parts... follow Master Lin instructions and you will have safe and steady progress.
You are perfection.
Iam2 
