[His eyebrow twitches a little at Hughes' arm comment, but coming from Hughes it doesn't set him off or even bother him much. Now if it had been Roy...]

It's just that... alchemy's always been part of me, I guess. But as long as I can do something...

From what I've found, the ability only works on weapons when I'm resonating with them. It's just like alchemy, their shape changes however I want it to--well, within reason. Equivalent exchange and all--I can't make a giant cannon out of a sword, as far as I can tell. [Which is unfortunate, he thinks.]