Countless YouTube videos said that as long as you used one method to anchor your stitches before you cut, you shouldn't have to worry about unraveling. I ended up using the crochet method, we've though I ended up machine sewing it later anyway since I was planning to install a zipper.
|You can tell I don't crochet!|
Then, the moment of truth, time to cut!
What I had when I was finished cutting:
Then I pinned in the zipper and ran it through the sewing machine. I only had to redo about two inches where the knitting stretched and caused the pattern to be misaligned while I was installing the zipper. Which is a huge improvement on the last project I put a zipper into!
So here it is with the zipper installed, inside view. I sewed the sides down where the sweater edges are crocheted.
All that is left is the sleeves!