No problems 
Things they worked on with me personally was the ‘sprinters lean’ I worked on this with Blake a few times a week. No real cues just when you bring the head up from accel keep the chin in slightly and make the upright transition smooth…dont rush to see the track. Hands to chin and strike down. Blake’s ability to hold the sprint position was unreal. Relaxed in the face…stepping over and down.
I saw and heard a few 200m cues too. The main one was with regards to turning the shoulder (the right shoulder) towards the straight away while running the curve (if that makes any sense) with a slight lean in towards the inside part of the lane. I remember Ato saying something similar on the HSI documentaries.
Watching them train is far better than watching a one of race…you get to see the movements over and over again.