[theBCnut]

It sounds like you are doing great with him. Keep working on the training. When you take him out for a walk, try to freeze every time the leash goes tight, and treat him when he walks on a loose leash. That will teach him that he gets to go where he wants faster if he is polite about it, and there is nothing negative to frighten him.

Some dogs are very sensitive to voice. If you use your voice carefully, he will become attuned to you and will learn to listen for your approval.