I use this Wali dual arm WALI Dual LCD Monitor Fully Adjustable Desk Mount Stand Fits Two Screens up to 27 inch, 17.6 lbs. Weight Capacity per Arm (M002LM), Black https://www.amazon.com/dp/B07LFNGTJ4/ref=cm_sw_r_cp_api_glt_fabc_VSSX0M19CV38B3NTCWZQ?_encoding=UTF8&psc=1
Had to buy an extension to make it taller a bit and an extra Wali mounting plate to mount the 49 inch at the bottom
The colors are not that great honestly, my main monitor is a Hp Omen 27 inch 1440p (144hz) and the colors are way different. I’m using this monitor arm, it’s unavailable but I’m sure many of them are made in the same factory anyways:
https://www.amazon.com/dp/B07LFNGTJ4/ref=cm_sw_r_cp_api_fabt1_oEEWFbBSRK5DS?_encoding=UTF8&psc=1
Currently setting this up on my recumbent bike for a Dactyl-Manuform. The cheap arms with post only height adjustment are better since they don't easily move in Z. You will definitely want an arm with screws that you can tighten to lock the config. I got this one on Amazon, https://www.amazon.com/gp/product/B07LFNGTJ4/. It is plenty stable unless you really lean on it. You will need to 3D print brackets to attach to the VESA mount. The monitor rotation and tipping is great for trying tenting and tilt configurations.
If you are working at a desk it may be a little bulky, but I really like the setup for my bike. I will likely post some pictures when the full setup is complete. I am working on the VESA adapters at the moment.
Mines are 27”. You can add any monitors that have a vesa mount or buy a vesa mount adapter. These arms go up to 32” I believe. Here’s the amazon link
Here’s the tray for the laptop that can be mounted to any vesa adapter
I'm skeptical. This looks like a horrible deal for a dual monitor arm in this class. There are others on amazon for half as much with the same specs. I don't know how much I'm willing to pay for the peace of mind of having a redditor in the company I can contact, but it's probably not double...
Especially if you can afford to step down a tier, if you're trying to mount 2x 27" screens, you can get a dual monitor arm for more like a third of this price.