Grab it anytime, I have no plans to use it... err GESA at Fox Creek today... hold on
In the first several years of building, it was not uncommon for me to go grab a previously built wheel for reference. I don't have to do it these days but it took quite long time to make sure I got the gaps in the right places, hub logo aligned with the valve hole and the wheel sewn up correctly.
I start with my key spoke in the same spot each time, once it's in place, it dictates the rest of the build. It's an inside spoke on the left of the valve hole positioned about 10 o'clock so the hub logo is visible through the valve hole.