If one is using chalklines on an irregular timber to define refence faces and edge, then doesnt that leave a portion of this timber outside of the finished building profile. For instance an exterior post that is layed out with its crown toward its side wall refence face . Or is it that one would plane down the timber that lies outside of the the chalklines in order to apply the enclosure for the frame? Or do you just deal with irregular surface as you apply the sheathing, exterior...? Maybe this is a stupid question? Maybe if you have pretty straight pieces ,this does not amount to much, but then why would you even need to use chalklines then. tb