TKick Tip To Build Great Underwater Dolphin Kick

We received this tip from one of the coaches who uses TKicks:

Attach the TKick a little closer to the wall than normal and ask your swimmers to make a turn without touching the wall. Once the turn is made, they must then dolphin kick underwater beyond the TKick. This is difficult because the swimmer has to start from no speed, but it builds a great underwater dolphin kick.