How to construct a random movement system device

[Urendi Maleldil]

I've tried it out on a facility and on a component but it doesn't work. According to the Modding 101 guide, the System - Random Movement ability is only valid in SystemTypes.txt. Is there some sort of hack or workaraound so you can actually create that ability during the game?

Is there a way to mod a nubula creator so it only creates a nebula that has random movement instead of sight obscuration?