Interesting idea. I think I would test the first aedtracker on your feet without head tracking just to see if the foot rudder idea works first.
It might feel a bit weird to control. But could be fine if your just pivoting from your heel and have enough deadzone for the center.
I've been thinking about this very thing for weeks now, but thought the idea to crazy to suggest it to you guys. Thanks for mentioning it OP.
I'd much prefer a tow mounted EDTracker if it works, because then I move my head about and check out my temps, teamspeak, etc on my other monitor to my left without having the games camera all go nuts.
I guess just stitch some Velcro onto the end of a thick sock or cut down cheap slipper.
I game and compute from my sofa so have everything set up for that. I will have my legs up on a footstool with my toes pointing up, so movement left and right and forward and back is real easy, even a little twist left and right. I'm riddled with arthritis now you see, so gave up my computer desk and chair days for the sofa.
Can it work on toes? If it can be done, I'd much prefer this.