Technomagus

Big question: if Raboniel could possibly corrupt or un-make the Sibling using Voidlight, could Radiants restore the unmade with Stormlight/Towerlight/Lifelight? How would you keep an unmade around to do it? The Sibling was attached to Urithiru so there was a conduit. Are there similar conduits to other unmade (lost Dawncitiy ruins?) or could it happen while trapped in a gem? I would bet it would require an experienced and powered up Bondsmith. C'mon Dalinar or Navani!