Could i mount this unsung only the top 2 screws? i.e. on the bottom 2 holes of my stand. the top 2 holes are already in use by another tray.

I doubt you will have the clearance or the weight limit latitude. You could use a VISA Mount plate doubler, vertically fitted to the arm to provide clearance and a safe and strong mount (also use stronger M5 stainless steel mounting bolts (A2 or A4 marine). However, first calculate the weight of the adapter Bracket, laptop mount, your chosen laptop and the existing weight of your other bracket and item to ensure you do not exceed the maximum OR level weight. If you exceed the level weight your arm will not stay in position across the full range of movement (refer to Ergotron instruction sheet for both weight limit values).

Can i adapt my hx dual monitor arm to fit one of these to work witha g9?

The arm may not have the capability to support the weight of the G9. The monitor is around 15 kilo, as long as the arm can hold the weight ...

Can this attach onto the ergotron lx desk mount lcd arm w/o extra equipment (ie instead of attaching an lcd i attach this tray & my laptop)?

Yes it can, it comes with all of the bolts and accessories for securing the laptop to the tray

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Ergotron LX Extension and Collar Kit - Mounting component (articulating arm, installation hardware, cap cover, pole collar) for Monitor - white with grey accents - screen size: up to 40" - pole mount

Product ID: 89377558

Details

Brand
Ergotron
Colour
White
Compatible devices
Monitor
EU Spare Part Availability Duration
10 Years
Global Trade Identification Number
Material
Metal

🔩Complete installation hardware included

⚙️Precision articulating arm

🖥️Supports up to 40" screens

Description

🖥️ Elevate your workspace—because your monitors deserve the best view.

ROCK SOLID STABILITY - Engineered to minimize screen wobble—even during desk movement, your monitors stay steady and secure.
SLEEK MODERN DESIGN - White with grey accents complements any contemporary workspace aesthetic.
EFFORTLESS INSTALLATION - Includes all necessary hardware and cap covers for a clean, professional setup without hassle.
FUTURE PROOF COMPATIBILITY - Supports monitors up to 40", ensuring your setup grows with your tech needs.
SEAMLESS MULTI MONITOR SETUP - Perfectly integrates with existing Ergotron arms for a sleek, stable triple display experience.

The Ergotron LX Extension and Collar Kit is a premium mounting component designed to expand your multi-monitor setup with a robust articulating arm, complete installation hardware, and stylish cap covers. Supporting screens up to 40 inches, it ensures rock-solid stability and seamless integration with existing Ergotron arms, making it the go-to choice for professionals seeking a sleek, ergonomic, and future-proof workspace.

Specifications

ASIN	B07516GL7J
Best Sellers Rank	211,845 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 1,086 in Computer Monitor Arms 1,209 in Kids' Play Trucks
Brand Name	Ergotron
Colour	White
Compatible Devices	Monitor
Customer Reviews	4.6 4.6 out of 5 stars (83)
EU Spare Part Availability Duration	10 Years
Enclosure Material	Metal
Global Trade Identification Number	00698833063592
Item Type Name	Ergotron LX Extension and Collar Kit - Mounting component (articulating arm, installation hardware, cap cover, pole collar) for Monitor - white with grey accents - screen size: up to 40" - pole mount
Item Weight	2 Kilograms
Manufacturer	Ergotron
Manufacturer Part Number	98-130-216
Maximum Tilt Angle	70 Degrees
Maximum-Supported Screen Size	40 Inches
Minimum-Supported Screen Size	40 Inches
Model Number	98-130-216
Mounting Type	extend
Movement Type	Articulating
Number of Items	1
Product Warranty	10 Years
UPC	698833063592

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