Improved: Trolley now lock objects on it.

New: models for GPU servers (Green)

Fix: Rebind controls was excluding mouse clicks

Fix: exiting trolley does not push player that far back anymore

Improved: Simplified the overhead cable holders to relieve rendering strain.

Fix: issues with rackposition marked incorrectly and be able to stuck two devices in one spot

Demo limitation:
no wall expansion
no fiber optics