If anyone is looking for a simple and rather effective way to keep your grow tray elevated in your tent I found a company that makes custom sized dunnage racks.
I have a dunnage rack in my apartment that I use to store some of my IT gear and tools. I was going to use that, but it was too long, I wanted extra space for a 3 gallon run-off bucket.
https://www.customdunnageracks.com/default.aspx
EDIT: They are also very light, so anyone who has back issues shouldn’t have any problems moving these around.