Yes, that's basically what I did. Had mercantilism and skyscrapers early, although no Big Ben (I usually get it when going commerce, but couldn't fit it in the BO this time). Was enough, however, to buy 5 Labs at plastics. I took out extensive loans leading up to labs, so when spaceship factories rolled around, I just renewed them as needed. Had pretty good GPT by that time anyway. Couldn't get any Nuclear Plants this time, though, due to lack of uranium--Casimir took out the CS's that had it Had one Solar Plant. Yep, 1500 a part. After Apollo, I switched all my cities to working mines, staffed factories/workshops, etc. 5-year plan helped a lot. With Hubble and SS Factories, I think my parts took around 11-12 turns in most cities. One city was a little slow, around 14-15 turns, but I timed this to finish with the Hubble city's part (finished Hubble about 3 turns after Apollo). Nuclear plants could have shaved a few extra turns off.