It's when you sit back and admire your work of art, then say ..."oh crap, I am short by a 1/2".
OK, measure from bow to deck beam. Measure from bow to stern bulkhead. Measure right ... Seemed fine when I did it. I measured. Marked. Came back later, Checked it. checked it again. End result, as I find out as I installed coaming - distance between the deack beam and stren bulkhead is about 1/2" short.
Have clamped and glued coaming and all works OK. But, when I get to cutting, sanding, etc. after resin has cured I think I may have to bore into the deck beam to make it all work out, unless I can do some magic with the router to make the error invisable. Making space in the stern bulkhead is not an option as the bulkhead is only 4MM thick. I am concerned that I will weaken the deakbeam with this plan.
Any thoughts on this issue? I am sure I am not the first person to mess it up. May have been my enthusiasm to get on with the sanding.
BTW - can't wait until next boat when I understand how it all works!!