My Father & I rebuilt that Bridgeport. That is what he did for a living and was a class A-1 Maintenance Machinist. So all of our machines are keep to high tolerances.
We have room to grow & are looking to already. We are looking into a large format 3D printer & Milling Machine.
This is our 18' x 10' layout we have. It was installed with a H.D. caster under each leg. This allows for easy access to the insides of mountains & the back side of the layout. 3 separate loops with a Mining area & a Rail Yard all in O gauge.