How to make Chell hold Atlas's/P-body's Portal Device tutorial

Requirements:
1. Portal 2 Authoring Tools
2. Smartness

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Step 1: Open up Hammer.
Step 2: Make 4 walls, ceiling and a floor. Size: 1024x1024x1024 (recommended, can change it by yourself)
Step 3: Spawn a Weapon_portalgun
Step 4: Turn off Smart-edit mode for weapon_portalgun
Step 5: Add a new key value named "skin" and set value to (float 0-2)
0: Chell 1: Atlas(blue) 2: P-body(orange)
Step 6: Compile map
Step 7: Shoot 2 portals on the corners
Step 8: Observe the Portal Device
Step 9: Enjoy

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Known Bugs: View model textures won't change LOL