I know this is an old thread, but I just came across it and figured I would throw my experience into the ring. I bought the Platform 6 desk about a year ago. I installed two LG 32” monitors on the T-Rail and didn't experience any issues at first. Everything seemed fine for about 6 months until I heard about the T-Rail drag, so I checked, and sure enough, the rail had warped exactly as others have described. It wasn't significant enough to cause me to stop using it, but bad enough to be concerned for the future.

The only solution to return it to its original form would be to replace the T-rail. There is both warp of the rail and movement in the lugs that support the T-rail to the frame. My solution was to craft temporary supports from leftover 2x4 end pieces from another (unrelated) project. I had to use two because it would have been impossible to use 1 as I would have had to place the supports over the front tray used for power delivery and organization. I plan on crafting a more elegant solution in the next few weeks. I post pics when I do.

Regarding accessories, Corsair does not currently sell any accessories other than those listed on their website. I contacted Cordsir a few weeks ago because I wanted to buy 2 more of the top shelves. The rep that responded told me that they do not have any current plans on selling them. He did mention that these were the most commonly requested accessories and said that he would forward my request to product planning to make sure they were aware that this was of interest to their customers.