Changeling arms/legs takes over your mind

[Marquesas]

It seems to me the chances of this seeing any use is so vanishingly small it isn't worth implementing at all. First you have to have someone who happened to get into a limb-removing accident, then you have to somehow convince another person to remove your limb and attach it onto that guy's limb instead of reattaching his own limb or getting a cybernetic limb without getting either the surgeon or the victim suspicious, and then you have to mess up as a Changeling (which you probably already did by doing something so stupidly obvious: more likely than not you'll have your Changeling ass lynched right then and there when you offer to donate your limb) and hope the victim is absent-minded or braindead.

Scenario: You, the despicable, rude MD changeling premeditatively have your arms and legs replaced by robotic appendages for fun. Now you have 4 limbs to spread across the station. A rude traitor appears out of the blue and PDA bombs some people, yielding an average of 4 missing limbs. People walk in, and you use your own limbs as replacement for theirs (you can replace at least 1 this way). This use-case isn't that far-fetched.