These are most of the images I have, although I have a few more I need to search for. I have in excess of 90,000 images on my 8 PC's and I am highly unorganized.
Look at the 5th image, this is key to Zalem's success as a sturdy rig and triple monitor stand. Note how the nut is welded on a outside edge. This gives clamping power on 2 sides unlike rigs that have the nuts welded on a flat face. I have good quality knobs that I purchased and they make a a big difference to the cheap ones or just using a plain bolt, both in function and aesthetics.
On the 4th image you will note they use articulated arms which will up the cost of the build. I have my rig and monitor set up where I think I can cut and weld the outside arms to about a 70°-75° which will eliminate the need for articulated arms. Of course this will result in no fine tuning.
Basically there are two different size square tubing, 1 1/2" for the outside sliders and 1" for the main structure. If you are inclined to go out and purchase the articulating arms I would suggest to purchase top quality arms and avoid the cheap ones at all cost. Of course that will be dependent on the size of your monitors or HDTV's, I believe my 55" Sony's are about 95lbs. If you are using a 24" monitor you probably can get away with cheaper arms.
The last photo is a blueprint supplied by the good folks at Zalem in which I converted from Spanish to English. Again it uses the corner welded nuts that allow for superior holding strength which is the key structural component. Finally for the finish I would recommend powder coating the rig and monitor stand. Paint chips and peels very easily, while powder coating will last a life time and it is very durable.
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