The 5-stitch stockinette panel you see running down the center of the soon-to-be-cardigan is where I'll be doing the cutting (The actual 'cut-line' is scored in the photo below with the dotted line of red wool). After that, I'll just need to add the button bands and the collar. Oh how I love the seamless.
For now, though, it's time to start reinforcing for the cut!