

It is still heavily experimental and buggy, but in Spring I managed to build some add-ons that turn a standard factory into a mobile factory.
In Spring61b2, units being built in a factory in movement wouldn't follow the factory, and the sphere based collision, made it a bit ankward, but with Spring62b1, the units under construction stay in there factory, and it's the footprint instead of some calculated sphere that is used for collision, so they work much better than they used a few days ago.
Just like I posted when asking for the possibility of having mobile factories in Spring long ago, those mobile factories are actually made of two units welded together. One that you select to control the movement, one that you select to control the nanolathing.
12 MB DivX video of factories growing legs and wings.
Link to download the ufo.