I agree with Paul, while I think your design is interesting and will probably be effective, I also feel it violates the rules about field interaction. If your legs only had 1 pole one 1 side of the bar, I could say "While interaction with the field is likely, it doesn't look like it is central to their design". As it is now, it sure looks like all your strength will come from the bar...
Only time will tell
and I do admire the design.
Greg