Ive been into glowsticking/spinning lights for 18 years, Ive hd the ultra poi for 2 and they are by far my favorite toy ive come across. especially now with the vortex upgrades , i cant wait to get the knobs either, very cool addition! My only question or thought is, on the 6 AAA batteries I need to pawer my ultrapoi and helix handles, will there ever be an upgrade to usb charging? At least for the ultrapoi ball, it can be kind of a hassle if while out at a show and the batteries die its kind of a process to break it all down and switch batteries, especially in a club, the security start looking at you funny thinking youre doing something shady when youre fiddling with batteries in and out of your pockets.The new Ultraknob has usb charging, it would be a logical and awesome upgrade to be able to plug in the whole rig and have a battery that lasts 6-8 hours on one charge