ive rocked the HELL outta these before. keep the fiberoptics IN!! im tellin you. you can do some really cool shit with those.. some straight mindfucking! pretty much when freehanding with em you can mash the fiberoptics from each one together making a glowing mesh of craziness.
they're fun.

and they're not really that big and bulky.. and they leave a pretty solid trail if you keep the fiberoptics IN. you can make pretty big patterns with em.