Like, I used to have a lot of similar toughts about weapons and stuff......hacking things to pieces and the like......
if you have a weapon, this could be quite heavy, and, with a motor with a 9v battery attached, will it be a weapon?
if you try and speed something up with a motor connected to a 9v battery, then this could either be pointless, or i'm sure if the motor cannot keep up, then this could produce it's own flaws. Generative effects?
If it was me, I would remove the motor and put some sort of extra circuit in, like a lazer pointer........something like that.