both of those sound great. hey the ability to decipher those special books, is how she gets the ability to build the machines, they give her the plans and blueprints on how to build and connect the pieces,and she gets the inspiration on what to build from her fantasy novels. I think she's also able to power the pieces while she's in them or holding them, so the ones she's using directly don't need fuel.  but she can still build a fuel system if the gadget needs to function remotely.