"Square makes for barbs that make it harder to pull out once the arrow is in but either will work." They used to have a man who hunted game for the people in the city when he was growing up. His wares weren't kosher but Erik had seen his arrows and talked to him as a youngster.
"Yes, I can work on it with you. I am still experimenting with spring tempering, it's more difficult than other types of steel. It's a good excuse to experiment more." She had grown a lot with her work, Erik trusted her to make good decisions and have good ideas.