There’s some pretty good gas spring monitor arms, I use a few at my desk. The one I use for a fairly heavy 27inch monitor might fit your use case but they can get pricey. www.ergotron.com/en-us/products/…/45-241#?color=p…

The springs I used here might be a bit weak for a monitor, I think the long ones are four pounders. But I don’t know much about springs and I just got ones that looked right from Lowes :)

As far as tips from this build, being able to change configurations and adjust positions did a lot to shore up the gap between what I wanted to do and how little I knew about any of this. Also, I’d probably do a 90 degree bend at the middle link.