Well, before I threaded them on I made sure to run a string from end to end to get a center line. Now, I am lining them up to the center line. Thus, the two marks I am lining them up by are the center line, and the DWL on both sides. The hitch here is that I am building it in my backyard so warping may occur at some point.
Paul:

Paul--

: I think the consensus here is that plus or minus 1/16 inch is achievable and
: good enough to build from.

: Have you checked that your strongback is true? Are all the stern forms off in
: the same direction? What marks on the forms are you using to align them?