This is just an idea for a tier 2 walkway.
Have a conveyor belt mounting point on the bottom of all the walkway frames. The walkway would be the same height as the 8m x 2m foundation, so the spacing of objects would remain the same. The width and length of walkways would not change.
This would allow the player to put which ever conveyor belt they need on the walkway and be able to follow the line to its destination over long distances instead of just running on the conveyor belt itself.