On the Texas Star you can actually estimate were the plates will come to a momentary stop... and you can figure out which plates will cause it to spin faster. You have to keep it balanced, don't shoot two next to each other right off if you can help it.
I hit the wrong plate at the wrong time once, and the star just started spinning without stopping. It went several revolutions before slowing down. Cost me lots of time.
I am a Soldier. I fight where I'm told, and I win where I fight."
GEN George S. Patton, Jr.