This is cool!10/10
There is a bunch of things you can use this for. Its the ultimate stabilizer. Now i got another idea, you could use this to make a gyroscope, perhaps if you put a clutch/motor on it, you could have a steering system for rockets.
Its very cool, but don't you thing the killer mechanism needs a bit of work, You only need something the size of a pin to come into contact with them spawns
Could also have an anti-spawn spawn 'er at the top that made self and other collide events (in the correct collide set) Self destruct.