I think I have finally solved my blister problem. I dropped some Serious Coin on Level 3 Thorlos, and I have managed to play three times without getting a blister on the ball of my foot. I still have to try them in a private lesson, as that is when I am most likely to develop a blister, but I am cautiously optimistic. Funny thing. They say you may need to go up a size, but I didn't. They work fine with all of my shoes. Thank goodness. Blisters are no fun at all. Thanks to all of you for your recommendations!!!