Hi, I really need some help with mco. I am practicing the spring forest qigong mco cd led by Master Lin. I have a hard time visualising the back channel. I can only visualize the right side of spine and not the central area of the spine. I have no issues with the front channel. Recently after some practice I noticed energy moving on the right side of spine and ending up in the right hemisphere of brain. It is creating heat in my head and I cant move the energy from right side of brain to the front channel. I think I am moving the energy in the wrong channel on the right side of spine which is bladder channel.Any tips on how to visualize the energy moving in the central part of the spine between left and right vertebras. I mean on the outside of spine not inside. Would really appreciate it.   Thanks