Out of curiosity, do you suffer from any sciatic nerve issues? Any alignment or back problems? Have you had a professional bike fitting?
At this point, I would start looking at other potential problems as the root cause of numb feet. I've had numb toes every so often on and off my bike. A simple stretch alleviates it almost at once.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher