I know I'm on a mission that has technically already started, but I'd just like to ask a question about a certain medical concept: Organ PrintingYou said the problem with fleshknitter was that it grew things very quickly but didn't provide any structure for the cells.
What if there was a device a medic could carry that could "sculpt" organ scaffolding that is then pumped full of fleshknitter? Then the resulting cells would have a scaffold, something that would guide them, help them form the proper structure, the proper type of cells.
The advantage is that you have two tools ("printer" and fleshknitter can) that can heal most kinds of injury. (Although you'd probably need some tools from an advanced kit as well to make your job easier and more likely to succeed, since it would be better if you clean the wound and stop the bleeding and prepare the area.)
The disadvantages are that it takes more time than merely injecting some fleshknitter in the wound (printing an entire arm would take forever and probably drain the entire printer cartridge, but merely reconnecting a limb or fixing an eye would be relatively quick). It's also a sensitive process that requires the patient to remain reasonably still and the environment relatively safe. And, even though the software in the tool handles many things like analyzing the shape of the wound and knowing how to print certain kinds and configurations of flesh, the medic is responsible for making the ultimate choices about what kind of cell goes where and what shape the organ should have (meaning that with a bad roll, you might end up with an eyball in your guts). So it's much like real surgery in a way.
Overall, not as good, quick or easy to use as Xan's body and it can only work on fleshies, not robots, but it might be cheap enough and versatile enough to justify its existence. I could see it as an upgrade for a medic who already has an advanced kit and a can of fleshknitter.