Oh, here's the ride report!

Re shoes- you might look into Superfeet from REI- insoles for your shoes with an arch support. Also sounds like your metatarsol arch is the source of your pain. I have metarsal arch buttons that I use in my shoes in addition to my superfeet insoles. Can ride a very long time.....no feet issues this year.

What you have done by riding that distance is discover what your body needs when you spend more time in the saddle. You'll also learn about drinking and eating, electrolyte replacement, shoe fit, how the bike works over long distances, etc.

Re shoes- I have carbon sole shoes as they are stiff and can support my feet for a long time. I also can generate more power hence ride with less effort. Spinning becomes an essential technique for long distance riding.

Great job! To me, every century is a lesson learned. Welcome to the club!