THIS WAS THE DEVELOPMENT MODEL ! ! !

Refer to:
https://www.thingiverse.com/thing:6275989
for the whole railway tunnel boring machine, with segments and truck

The development still goes on.

Tunnel boring; tunnelier HO, N, Z 1/87, 1/160, 1/220
Tunnel boring machine segments, Voussoirs de tunnelier.
Internal diameter: 9,45 m.
This is an artist view. The cart is not included.
The template shows the free space, le gabarit montre l'encombrement.

V30xx and V45xx to be used at the bottom of walls if you do not make full bore.

Portalxx are available if you want to do a full installation in modern style.

Oct 17, 2023: I have plans to design an artist view of the truck. Stay alert !