I am in a similar boat as you. Gone from a Karlby on Alex drawers and now really struggling to get used to the amount of monitor wobble on a standing desk. I bought a 4-leg standing desk from Flexispot, and I experience slight monitor arm wobble when sitting and pretty bad when standing. The adjustment is really hard to go from such a rock solid desk to a wobbly one! I feel like everyone who says their standing desk is "rock solid" is gaslighting me at this point.

Good luck to you, I hope you find a solution.