I saw Mark Baker last month and worked on his system when I returned home. The few things he told me to work on is the timing spot. Here, the arm is parallel to the floor as the slide foot is flat and in front of your head. And to keep my hips level.
The video has some pre and post clips:
http://youtu.be/CN42r8uC-yMI'm still working on it when I can. And with tourney's coming up this summer in Reno and NorCal area, hopefully I can get this down.
Feel free to comment.....