As you can see, the blister I got ten days ago was pretty good sized. There's no fluid in it anymore but the look of the skin covering it makes it appear worse than it is. I've kept up my running but not so much without shoes because I really don't care for raw wounds on my feet. But I have been walking barefoot a lot to encourage the callous build up. As for my running, my lower calf muscles are a lot stronger now and I'm able to land on my forefoot for longer distances even with my shoes on. I feel a lot lighter on my feet and like I have more spring in my step running that way. It will be interesting to see how that affects my speed. Well, what little I have.