Tablet StandGood quality tablet stand. Extends from 33 inches to 52 inches. Face pivots up, down and rotates (like a steering wheel). Lockable face plate with 2 keys. Heavy steel base plate keeps the stand stable. Weight is 12. 4lb

Example code (github)

Drive Module Solidmodel

Lockable face plate with 2 keys

All parts are COTS except for one main mounting plate (could be laser cut metal or wood) and a few small modifications on some parts

Solidmodel - Sheetmetal attachment

Example Waveform

Solidmodel (Right)

75 to 3 inch wheels

to get you on the right track

Bumper Board Solidmodel 30

Solidmodel (Left)

The steering gear total ratio is approximately 126:1 made of all steel gears with an aluminum pulley for the final 3:1 reduction