Made a special fixture to do the backsides with a message to who ever we gift these out to. Simple pocket in MDF, located using the same 1/4" pins I used as zero everything else, two wood screws to hold each ornament down during the cut, MDF is just 2-sided taped to my waste board. I can engrave a message (as shown below) in about 5 minutes including swapping out ornaments, I never even turn the router off (it just goes to the back of the machine after cutting). This makes it easier than doing a regular 2-sided flip job and I can do personal messages to whoever I’m gifting it to. The top “hangy hole” is used to index the correct rotation, the pocket at the bottom is simply to make it easier to remove the ornament. I use 1/4" steel pins and drill the holes using my XXL so they are true to the spindle even though my machine base is slightly out of square. Fixturing holes drilled using a 1/4" drill bit at 5000rpm (I use SuperPID), peck drilling coded from VCarve Desktop:
This isn’t my idea straight away, I got the idea from a post @ApolloCrowe made last year to hold pennies for engraving, works great!
Dan