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Castrum-Senus : Turris-Vulgari -- Main-Bridging-Tower Core (single spiral, CW)

Central bridging tower. Stackable at 0° or 180° rotations. Can also be placed at 270° rotation (three clicks) to change the alignment of the stairs (although the tower layer beneath must also be a single spiral to work). Compatible with double spiral variant.

Allows troop movement at different elevations, and seamless floor changes along internally concealed spiral stairs.

Bridge mounting points at all four quadrants can be shifted up or down as needed to accommodate landscape (using associated Portico modules). Height-shift compatibility as follows...

== 0° rotation ==
"Stair-up" side: -2 to +1 Portico Modules
"Stair-down" side: -1 to +2 Portico Modules
Non-stair sides: -2 to +2 Portico Modules

== 180° rotation ==
Stair sides: -1 to +1 Portico Modules
Non-stair sides: -2 to +2 Portico Modules

180° rotation offers faster transit up and down spiral stairs, but with less flexibility to terrain adaptation.


***NB: After placing all components, test functionality by attempting to move a troop to each bridge landing and the top of the tower, ensuring each movement order shows as white and not red. This requires all fascia pieces and all portico slots be filled. These movements do not need to be completed.

Compatible with all Castrum-Senus components (unless otherwise noted).