[marchron]

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OK how about 36?

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1. Portal to on top of the block.
2. Portal to the right wall on the other side of the red shield, landing on the conveyor.
3. Portal through the tube into the room above.
4. You only have to stand on the switch once to peel back the portal-proof ceiling above the security camera.
5. Portal all the way to the left wall, disable the turret, then portal down to the entrance door platform.
6. Portal up to the room with the object block.

Should be easy from there.