This is a related ?. Now that you've blown up the sun and everything else. Asteriods are the remains. Correct? You have a planet builder, to reconstruct the asteriods. After it is finished, can it be repaired, to be used again? OK, so it's a dumb ?. I was just thinking how expensive it would be to rebuild the entire system. If you had to build "X" number of planet builder's that's all.
mlmbd 