I am still unable in left tongue mode to get the tongue to cross midline. I feel I switch over to the right tongue mode where I can move the tongue freely in both direction. There seems to be a strong connection with each respective eye. I have been playing with one eye closed and coordinating the the other eye with it's respective tongue in the same direction and then opposite direction. And then opposite eye and tongue. It is easy for me to create strain on the eye musculature if I am not gentle.
My right eye and right tongue feel to dominate the conversation.