Having used the punch serve I've had some opponents who let it bounce (on the floor) and then called a let because I've already moved onto the T . in other words they're saying I'm partially blocking full access to the front wall. Any thoughts on this?

Always had problems with is and tended to jump on the ball and poke it back short. Brilliant video

Absolutely worth its weight in gold so a years subscription is peanuts. Love Jesse's way of coaching, in depth explanations and slow mo.