Not sure. I've drilled holes in all the ones I've made so far, and they work perfectly. The nock is REALLY thick right there, so I don't think it's doing anything to the structural integrity of the nock.
But... I think it would still be pretty visible without the hole.
I was shooting with them again last night RIGHT at dark... these things are so cool; I can't believe I waited this long to either build or buy some. I need to shoot some video of the flying at dusk... but I've got to get to work on my next colum so I can churn it out by tomorrow night, head to the St. Louis Cabela's to work their Great Outdoors event over the weekend for BowTech, and then we head out Wednesday for Colorado... so I don't see it happening.
