Some of the `sort_arm` and `inv_arm` robot arm physical generation is related to the following models:

| Model File | Attribution |
| :--- | :--- |
| `arm/gg_base_v2-3.stl` | inspired by RAfADA - Licensed under CC-BY-SA 3.0 |
| `arm/gg_ef_cam_2_dof_v1-5.stl` | inspired by RPCM - Licensed under CC-BY-SA 3.0 |
| `arm/gg_femur_v3.stl` | inspired by OAR - Licensed under CC-BY-SA 3.0 |
| `arm/gg-large-swl-base_v3.stl` | inspired by OAR and RAfADA - Licensed under CC-BY-SA 3.0 |
| `arm/gg_tibia_v3.stl` | inspired by OAR - Licensed under CC-BY-SA 3.0 |
| `arm/gg_turret_spacer_2-0mm.stl` | inspired by RAfADA - Licensed under CC-BY-SA 3.0 |
| `arm/gg_base_turn_table.stl` | inspired by RAfADA - Licensed under CC-BY-SA 3.0 |
| `misc/gg_cube_2inch.stl` | inspired by 4CTO - Public Domain | 
* See https://creativecommons.org/licenses/by-sa/3.0/ for CC-BY-SA licensing.

**4CTO**
> [40mm Cube Test Object](http://www.thingiverse.com/thing:477)

**OAR**
>[Open Academic Robot](http://www.thingiverse.com/thing:368804)

**RAfADA**
> [Robot Arm for AX-12A Dynamixel Actuators](http://www.thingiverse.com/thing:166430)

**RPCM**
> [Raspberry Pi Camera Mount - Da Vinci 1.0 / 2.0 3D Printer](http://www.thingiverse.com/thing:523304)