You are certainly welcome here, Ted. Glad you've felt that from the start. BF running certainly does work the calves a bit, but relaxing your feet (basically just letting them dangle at the end of your legs - they'll land right, I promise) will help you keep from trying to "catch" yourself with your calves. Your muscles will fire automatically when your forefoot comes down, which is where the impact should be dissipated. Using your calves to try to create controlled deceleration in your leg motion will cause them to work much harder than required, often producing soreness and tightness in them. I think we all go through this learning event/stage as we figure out how the mechanics are supposed to work. I certainly did, and, toward the end of longer runs where my form starts flagging a bit, sometimes still do experience a little of this.