Could you start with a single block, do the ornamental turning, and then quarter it on a bandsaw with a fine blade to avoid all the faff with the paper, glue and tape?
Maybe a useful tip. I take the blocks and add about an inch in length. I then glue just the end 1/4-1/2" of all the blocks together. After turning, just trim the ends off before the glue and there's zero fight to pull them apart!
This is wicked. I dreamt up something similar today and now I'm searching for people with similar ideas. You're the first I have found that had the same thoughts.
Maybe use something better than pine... although im impressed it didnt tear out an ungodly amount. This is the worst inside out ornament ive seen done....
An idea. What if you made the blocks longer and not round them off. Do your turning on the outside, and then like you did do the outside but do it so you can separate them and glue with the first outside turning back to the outside. Then turn the square ends down? I'm not sure I explained it well.. Thanks.