One thing that I noticed is that if you have multiple factories running they seem to que into the same blocks for projection construction, repair, and deconstruction. What tends to happen is that if one of the factories starts a completes a job the other factories recall nanites to reassign. I think that there should be a function that is one completes a block the others will drop off carried components into any nearby block that can still requires them. Similar idea for the deconstruct function. If a targetd block is broken down the nanites returne to the factory to be reassigned. They should be sent out to gather until they are at capacity and returne. Basicallly specific targeting is a waste of energy and time. I think these ideas might help.