I cut out the basic design out of a piece of stainless steel last night and I can tell you making any of those more than once "ain't gonna happen". I haven't bent the steel to any kind of an angle yet, but stainless is just to difficult to cut and work with.
I'm thinking of maybe using some 1/8 wall thickness X 1 1/2 " aluminum angle and working from there. Aluminum can be pretty strong even on that downward pressure. Perhaps with a steel strip across the top if needed. Perhaps the legs could be a little wider than 1/2" to add some additional strength. Would 5/8" wide still fit?
For those of you who have made or used the tool..any thoughts?