Oh, okay. Still, it's tricky and can easily be improved upon, with a little addition to the existing tech.
The idea of a rocket-launcher isn't as straight-forward as it sounds. I've just been trying to get a lead attached to a 'dog' on castors. Turns out a minimum size of grabbable material is needed, which is quite a lump. Actually it must be a minimum mass? A broad, thin sheet of polysterene was grabbable from all positions. Still, little handles don't appeat to be an option, unless cylinders are less grabbable than cuboids? And objects like that are generally unwieldy it appears. Also attaching the polystyrene handle to some string, it's as though the string attachment added considerable weight. It was no longer possible to jump around with the polystyrene. I could jump up, but trying to jump left or right just failed, and the handle was dragged along the floor. I'm not convinced a weapon could be built that was 'shoulder mounted' or head mounted or held in front of SB. It'd have to be something substantial moved along the floor, like a mini-cannon.
. Design your own chips in LBP ... lol! Maybe they can make a special version for designing chips and do a contest for who can design the next Cell ... 
