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Train World Tunnel Boring Machine

This is a tunnel boring machine based on Masu's Train World. I modified one of his freight trains into the monstrosity you see here. It comes preloaded with enough materials to lay down 250 meters of track. The track has blueprints preloaded into the projectors so it should keep building as long as you keep the machine fed. I've been running into some issues with grids not remembering projections after a few iterations so you'll want to keep watch.

To use align it in the direction you want it to go, paste it in (or build it engineer like) and activate the drills, drill head, and welders on the toolbar.

Disconnect from the connector. There are thruster and wheel overides. I usually put the wheel at 100% and the thrusters at about 74%. This will keep the car moving at a steady pace but allow for a little bit of 'bounce'. Slower is better, you just want it to creep on its own.

I recommend grinding down projectors that are no longer needed. It'll make forgetting the projections later on less likely.