I love your product, my daughters got it for me a couple years ago. I have ALS and I'm unable to hold a tablet or use it without having it freestanding in front of me and a stylus strapped to my wrist. I broke a caster a couple of months ago and and feared I'd never get a replacement. I tried every description of your product I could think of before I stumbled on a picture on eBay. Once I got to your webpage I was in heaven until I realized you don't list casters as a purchasable item. On a whim I tried requesting "casters" and hooray I'm back in business.
My only complaint is that you're too hard to find. Do you sell the bungee cords?