Is there a trick to a 90 degree change in direction i.e. from a front punch to side?
The only "trick" that there is to it is making sure you hit with your fists in the correct order. You have to hit in correct order in order to make sure your hands are free to do the follow up punch. You kind of have to think a punch or two ahead in order to do this technique. Also, as stated above, I was doing my second punch in the FDP as a FCP instead of a FSP. That made it easier for me to follow through to the RSP because of body position and setup for the next punch.