No problem, glad I could be of some assistance! If your puts in the practice, I'm sure his blocks will decrease. Also be sure that he works on reducing his secondary behaviours, aka addressing the emotional / trauma aspect. Even if he reduces his stutter, he may still exhibits avoidance behaviours and hold back in conversations. He may still avoid phone calls also. I think CBT geared towards stuttering will help with these type of secondary behaviours. All the best!