That's how I tested building them to see if the game was really that stupid with the queue swapping.
Definitely abusive...
In my actual game, I just built the plating and cables from scratch. With the core piece, I built a plating component 2 years ahead of the other pieces, and retrofitted twice to get up to the core.
I probably waited a little too long getting the ringworlds up, but in the earlier turns (40 or so) I'd just learned that the value improvement stuff stacked, so I was busy trying to get those built all over the place, and dealing with the shift to using more organics and radioactives than I'd been used to.
I've thought about playing another game, to see how I'd do knowing what I need to do from the start. After about 10 turns I remember how much effort it was, regain my senses and decide to do something else.
