i've aquired a jag off my friend for jagfestuk, but it has no adaptors and ive tried various adaptors for it but nothing works. my friend says that the snes power supply works but its center positive, where as the jag supply is center negative. I've spoken to stone bout this and he says most cases 90% of the time when u change the polls on the adaptors and plug them into the jag it can screw them ova?