Gearlock Bunker

Bunker (door concept by Uberswe)

This build is inspired by a bunker guide made by Uberswe — the hidden door concept/mechanism is originally from their guide. The bunker itself and everything inside it were built by me from scratch. Credit where it's due: the hidden door idea belongs to Uberswe, go check out their original guide if you want the full version. This upload is my own take on a bunker built around that concept.

Door & elevator orientation note:

If you place the structure right after grabbing it (no rotation), the door will open to the left. If you rotate the structure so the door faces backward instead of forward, it will still try to open left — but because of the rotation, it'll actually open to the right instead.

If that happens, go to the mechanism below and find the Sequenced Gearshift block, then swap the arrows: change the left arrow to right, and the right arrow to left.

Note: the elevator uses the same Sequenced Gearshift block as the door. So if you rotate the structure and fix the door, you'll also need to fix the elevator the same way — otherwise it will spin/move in the wrong direction instead of going straight.