a couple of times i have tried using orbital engineers to build the laser platform (Death from above), which takes quite a while. After sending 60 workers to build on 1 laser platfrom (with positive economy) it took about 8 mintes to build it. Many of the workers did not point towards the platform being build, and it seems to take too long. When using only 5 workers to build one, it finished much faster. so I switched to selecting a couple or orbital workers and each building a laser platform on their own. resulting in me making about 7 of them in under 5 minutes. BUT only if I made sure that they would start building after moving towards it, (if they get a build order within their build radius, they wont turn and still dont build properly) In Summary: It looks like orbital workers 1. dont work when too many build on 1 building. 2. must get a build order outside of their radius to build properly.
This is why many players are now using ground/air fabbers to build the SXX platforms (this is technically a bug, but considering how buggy the orbital fabbers are I don't consider it an exploit).
for me ground workers also are hardly able to build them, having around 30 of them with positive economy it still takes me longer than building a nuke (which costs more metal)
I encountered this problem recently when i produced 10+ orbital fabricators to build teleporter quickly (gunships everywhere !) but they couldn't build... at all, so I could build teleporter without any assist and get it destroyed couple seconds after or bring sufficient amount of fabricators and wont build it at all. Also bugged fabricators seems to spray nanolathe in some random direction in orbital plane instead on target.
