Simple lab shaker

Simple shaker driven with cheap TT gearmotor 1:48.
I'm using it for PCB etching with citric acid and peroxide. One handle for speed control, other can manually rotate plate to middle position.
https://youtu.be/QlUJkduQwVI

Parameters:
Size of dish plate - 120x130 mm
Power - USB 5V 2A

Hardware needed:
1x TT DC gearmotor ratio 1:48
1x Female Micro USB Type B 5 Pin Connector PCB
1x steel rod d4x40mm
6x M3x12 screw flat head
2x M3x10 screw
1x M3x20 screw flat head
2x M3x30 screw flat head
8x M3 nuts
PWM controller. Potentiometer size 16mm, thread M7x0.75.

Tips:
Lubricate gearbox to reduce noise.
Print gears with good quality. Gears with precise dimentions will be silent.
On top of the plate glue double side foam tape to fix container
Adjust level with rotation legs