1/2 an hour was spent trying to figure out why the heck we were drilling J-channel to the spars. Turns out you just use the spars as a guide to where to drill the holes in the J-channel. The J-channel itself will be several inches away from the spars. Figuring this out required much flipping pages forward in the instructions.
Then 1 hour was spent drilling.
Berck 1.5 hours, Jonah 3 hours