User blog comment:DragonBlade1/Hidden Blade/@comment-1864567-20100727142538

but even if it's not existing then u could be the one who invents it, and building one with motors waould be very hard if u don't jave the skill to contruct them. just figuring out a working locking mechanism seem so be the easiest thing to do. and u don't have to be an ironforger to make the locking mechanism.