Sorry for the lack of news, I developped nothing since November 29th (one week wasted).
The interface for the setup of an assembling is completed in its main process.
It is working but need some additional work to display information about it, for the player, and to refine the behavior of the interface.
The interface to setup a building of an infrastructure has advanced a bit too, since some parts are re-used for this mode.
I will fully complete the assembling interface tomorrow and will work for the building of infrastructures next, as the final step.