I was using Easel for a simple design and apparently had the bit diameter set to 1/8", but intended to use a 1/4" bit. When I hit Carve and the confirm bit dialog came up I changed it to 1/4", but the carved measurements were off. When I went back to the design screen and changed the bit diameter and re-carved the measurement was fine. So it appears that maybe the bit diameter confirmation panel in the Carve sequence can only be used to confirm, but not change the diameter even though it appears to allow you to change it. Or I could be wrong.
Can anyone confirm?