This is the second video documenting my Model Storage Robot project. For an introduction, please check the first part available as Model Storage Robot Part 1: Big Picture, Big Plans. In this video, I'll build and explain the hardware used for the project. This video doesn't contain any SAP-related stuff (and the next two or three videos probably won't either), but if you want to get a complete overview of the project, it's probably a good idea to understand the hardware in detail.