How standing desk legs actually work

Investigating how separately motorized standing desk legs stay in sync even with very uneven loads, then dissecting a 3-segment standing desk leg to figure out how it actually works.

E7Pro standing desk:
https://woodgears.ca/dr/E7Pro

More economic standing desks (desks or frame only) for smaller desks:
https://woodgears.ca/dr/FlexiSpot

Or buy on Amazon. (E7Pro is not currently on Amazon)
USA: https://amzn.to/3zfBHoR
Canada: https://amzn.to/3lNGvyL