projector scissors lift

### Intro
In order to cleanly hide my projector in the ceiling, I designed this scissor lifter.

### Parts
#### To be printed
- 4x standard_holder
- 8x rod_mount
- 4x rod_blocker
- 4x sliding_holder

Other things depends if you want the projector reverse stand:
- 3x adjustable_mount
- 3x ball_joint_connector
- 3x ball_joint_connector_end

#### Additionnal
- 6mm bolts & nuts
- 10x12 aluminium tube
- Flat aluminium strip

For projector reverse stand:
- 8mm threaded rod
- 3x 8