Harvesting the AI ship is definitely and interesting question, i had not even considered that. It kinda goes against the spirit of the category imo. Then again i haven't looked into just how helpful it would be. Maybe I'll start there.

Is there any particular reason no one runs that category?

I have enjoyed this game casually for years and I would like to try to get a decent time for Build %. Any tips or knowledge anyone can share? I'm not sure where to even start tbh.