The bulkhead parts are still drying so I can’t do any work on those today so I decided to locate the long angles that were shipped with the wings and dust them off. The instructions say to cut the longerons to exactly 173 7/16″. I measured the longerons and marked it then checked again with 2 different tape measures to be sure. I then left it at that for the night. There is no way I want to make a silly mistake on these as it would be a nightmare to get replacements.