I am knitting a hat using a pattern that starts with size 9 and switches to size 10 after finishing the ribbing. I have a set of circular knitting needles but they are interchangeable. I understand how to switch over if I had individual size 9 and 10 needles, but not how to switch over with interchangeables. Do I need to go out and buy an individual size 10?
Thank You for the help