It’s time to cut nocks. I mark the position of the nocks about 1” back from the tip end and then make a line at about 45 degrees. I do this on both sides of the tip to help ensure that my groves will line up nicely.
Using a small rattail file I file groves on both sides using the 45 degree line as a guide.
After the initial groves are cut I round the belly with a rasp and/or scraper.
I finish filing the groves stopping frequently to make sure they line up with each other.