Using a platform to teach changes in position (fronts, finishes, etc)

I'm using the platform to reinforce the proper movements as Dragon does left and right finishes and moves into front position (for obedience or rally). This helps him learn how to swing his back end around properly. He already moved from front to heel quite well, but the reverse tended to be crooked. His right finish has been shaped solely with a platform so far. The platform can also help with building confidence in close, automatic tuck sits.