Moves

Playing with the propeller I thought it would look nice to make a helicopter from it. But then my fingers hide the balls a bit for the audience. If you use large enough balls this would not matter much, but still, you can better use the propeller in your show, unless of course you put a fifth ball on top of the stack, wow... I call it the Diamond.

This is a lot harder than the propeller, for the obvious reason that the ball on top pushes the rotating three ones outward.
As with the four ball stack this looks flashing with a fast spinning glitter-ball on the top. (which really doesn't show up on this video, damn..)

Of course there is a problem in getting the fifth ball on top of the stack while you hold the propeller with both hands.
The solution I thought up (though I can't yet do it smoothly enough) is as followed:
Show the propeller first.
Then hold the propeller in one hand as you pick the fifth ball from the ground and place it on your wrists while grabbing the propeller with both hands again.
Roll the ball between both arms towards your elbows (this is to give your hands some time to get the correct propeller position and to create some time between the picking up and using the ball in the next pattern)
Hold the propeller so that you have a three ball horizontal platform if you look at it from the top and then roll the ball between the arms on top of this platform.
Now open up the front balls, the fifth ball will slide in between and as you move your arms in a vertical position you close the stack and push the fifth ball in the top position.