[quote=@ActRaiserTheReturned]
<Snipped quote by Theyra>

For my abilities, I didn't put metal working anywhere for sure. I can't really make use of my idea if that's not there. 
[/quote]

Okay, so you want to change your CS to have metalworking and you would have to change or add how he learned that. If this skill is that important to your character's arcs then I suppose I can let you have it. But only this one time and only add metal working.