Question 1

I have a 30 inch ultrawide and a 27 inch. May i stack them?

Accepted Answer

I had two of these, each with Two HP Pavilion 32 QHD displays hung on each post. These weigh 15.5 lbs each(7.12kg) so that's roughly 30lbs, the mount worked like a champ.
 I would still be using it, but I changed to Ergotron adjustable arms for more placement control. A lot more expensive, but also a lot more adjustability. 
The only issue I had was related to the design of the HP Display. It's Vesa mount is at the base of the monitor, which put a HUGE amount of strain on the tilt adjust of the post attachment. I really had to crank down to get the monitors to not tilt forward. I mean A LOT... like, 'am-i-about-to-break-this-thing-off amount. In fact, I think the only reason I got it to work was that I had two posts, mounting 2up monitors side by side. Angling the monitors slightly allowed them to prop one another up. I also used industrial-strength adhesive tape to 'lock' the displays together for a 4up display setup. It was a big headache getting things setup, but once it was in place, it worked great for about two years.
I state all of that because, if you have a 15'lb ultra wide monitor that has a vesa mount at the BASE of the monitor (not the middle), you will likely have to turn the display upside down in order to keep the display from slowly tilting forward over time. I never did this because they aren't quite. tall enough to rock 2 32" displays with the attachment point all the way at the top. Plus I needed about 6" at the base for a Cintiq to slip under.
I did destroy a monitor when I let go of it before I had the tilt adjustment locked down completely. the display slow-motion 'flopped' forward and impaled (well, cracked the screen) itself on the corner of my laptop display. This wasn't the mount's fault, I just trusted when I should have verified.

Question 2

any chance this would work with the Samsung G9 49” ultra wide?

Accepted Answer

I can vouch that the weight of the odyssey or odyssey g9 is TOO HEAVY and does NOT stay up (will literally droop and tilt straight down without supports. I currently have 2 "MHQJRH Graphics Card GPU Brace Support, Video Card Sag Holder Bracket" (amazon item title) currently holding each of the corners giving it proper support to prevent falling down. Looking into a strong mount or better alternatives for support on the monitor itself.

Question 3

Secret labs magnus desk compatibility

Accepted Answer

I noticed the Magnus desk has a 20mm desk thickness, which AVLT-DM58-1 can support. However, the question is the depth of the cable management slot. The depth of the cable management slot has to be deeper than 150mm (tabletop 20mm + c-clamp bolt 130mm), so the c-clamp can attach to it.

Question 4

Would this work with a single 34” Ultrawide? Mounted towards the top of pole. Just looking for a taller mount.

Accepted Answer

Yes, you can mount the monitor at the top side and reserve the lower mounting place.

ASIN	B08JGLSC9P
Brand	AVLT
Color	Black
Compatible Devices	Monitor
Customer Reviews	4.6 4.6 out of 5 stars (271)
Enclosure Material	Metal
Manufacturer	AVLT
Maximum-Supported Screen Size	34 Inches
Mfr Part Number	AVLT-DM58-1
Minimum-Supported Screen Size	13 Inches
Mounting Type	Tabletop Mount
Movement Type	Articulating

AVLT 34" Vertical Ultra Wide Monitor Mount Stand with 2 Stacked 20lb Screens, Heavy Duty Poles to Save Working Space, Tilt and Swivel Adjustment for Fine Height Adjustment, C-Clamp and Grommet

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