[She can only imagine that odd combination of fashion and engineering in her mother's notebook. It probably would have been quite a sight. Bulla's notebooks have no calculations or blueprints in them. Her grasp of technology is well above average and she can follow instructions to do repairs others would require training in, but she doesn't have the genius level intellect to create advanced technology. Her understanding is still reasonably advanced for a teenager, though. Enough that she can have conversations like these with her genius mother.]

I think ki storing compartments would be a great idea. Then it could be fueled over time on peaceful days...but maybe have just a little spark of ki needed for starting it up? That would make it a lot harder for someone to randomly steal it. Especially if you programmed it to only allow it to be started up by the ki of people we know.

[It would be a shame, after all, to have the machine fully charged and then one of the stockholders (or more than likely a hired thug) take off with it.]