I saw one in a store, I don"t know what model it was, but I can assure you that it was completely vertical. The lower arms were empty, and the top arms were holding a Moog sub 37 at sitting height. Not a lot of weight I know, but it was totally stable. I was initially intrigued, but it was priced at nearly twice the cost of the K&M 18810 standing next to it. They had them in red, black and blue, some were slightly different from the others, different models I assume.