While I agree with using scales, it is just so much less messy. And altitude may be an issue, never had to consider that. I think there are other factors that

While I agree with using scales, it is just so much less messy. And altitude may be an issue, never had to consider that. I think there are other factors that affects the amount of flour you should use, such as the ratio of water already in the flour. If you use fresh flour directly from the mill, you may not need as much water in the dough. I also imagine the method of grinding the flour may make a difference.