I wouldn't go stuffing any foreign objects into the rotor set personally.. I'd first try jamming the jackshaft at the rear of that thing if anything (like with a wedge of rubber cut from an old tire or a used belt or something similar) Or... put your serpentine back on and tension it, then use the belt wrap around the supercharger front pulley to hold it in place while you loosen the jamb nut. Hit it with an impact wrench to help "shock it" and break it loose then from the looks of it you could easily slip a 2 or 3 jaw pulley puller over it to do the rest once the nut is off. (I'm just going off of google image search for reference)