The Terrellians were masters of boitechnology, the retrofited what they could of the Drex's implants. Though much of the technology they didn't understand. They were able to link some its its DNA to encourage growth around new implants, ones that were indepent and free of control or tracking devices. Terrellian's were creatures of beauty so the implant they gave the drex were covered with Boidermic matter so that you couln't see any robotics. The Eye piece was modified to function as the old one, but had a cover to mimick an eye patch, one the could be seen through. They found some very interesting things inside the Drex, which they documented and would further study in detail. The process took weeks to complete, it was hairy at times but the creature survived and was moved to a secret location.