Legs aren't practical.
In battlebots they give a 100% weight bonus* for walking, and it still isn't worth it.
However, they are awesome, and I'm all for cool stuff.
The main problem is that we don't have enough powerful motors in the kit to make an effective omni-directional walking machine. Which means, that instead of "legs" what we really need to build are linkages (which can turn with regular tank style steering).
I've tossed around a
mechanical spider linkage DT, but have never gotten around to designing it.
Why build it? Because you'd be famous instantly! Everyone at champs would come and see it!
If my team had more machining skills I'd gladly sacrifice winning for fame
*I've suggested FIRST adopt the same bonus in the "design the game threads"