All that’s really missing is a good artificial intelligence to control the whole process. And that’s the trick, isn’t it? These types of blue-sky discussions always assume certain advances for a successful implementation. Unfortunately, A.I. is the bottleneck in this case. We’re close with the replication and manufacturing processes, and we could probably build sufficiently effective ion drives if we had the budget. But we lack a way to provide enough intelligence for the probe to handle all the situations that it could face.