Box for OnStep Mini 2.0

Telescope OnStep goto controller Box for [MiniPCB2](https://easyeda.com/hdutton/minipcb2)

More info about OnStep goto controller on [Howard Dutton project](https://groups.io/g/onstep/wiki/home)

* Box FreeCAD source on [GitHup](https://github.com/romanhujer/OnStep-Box)

* For using HC-05/HC-06 Bluetooth recommended use my [PCB](https://easyeda.com/hujer.roman/bt_for_minipcb2)

* For Foucuser port use this [PCB](https://easyeda.com/hujer.roman/focuser_port_for_onstep-minipcb2) and for external stepper driver use [PCB](https://easyeda.com/hujer.roman/Focuser-with-NEMA17)

### BOM additions
4x 2.5x8mm self-tapping screws
4x 2x6mm self-tapping screws
1x Small power ship type switch size 15mm x 21mm

Options:
1x GX12 3Pin Aviation 12mm Connector (for PEC)

1x Pi-Fan 30mm 5V Cooling Fan for Raspberry Pi
4x 2x8mm self-tapping screws

4x 2x6mm self-tapping screws for focuser PCB

###Note
* Use a tap to create a 1/4"-20 UNC thread for holders
* Compatible Focus