I've just picked up a ROTF leader megatron, europian release. IN robot mode, his arm only makes the firing noise when it's pointed at the ground. I read somewhere that this had happened to shadow command megatron and that there was a way to fix it so it fired when pointing forwards, but it involved knocking out a pin. Anyone got ideas as to how to do this? I should point out that because I am totally blind and figure out my transformers by feel, pictures won't help sorry. Thanks for any help people can offer.