I also made the Inventables 3-d plywood reindeer pattern after reducing it a good bit (he’s 4" at the shoulders). However in doing so I had to adjust the slots - some more successfully than others. In order to make them fit I had to do a little sanding. . . not having any handy sanding sticks around, I discovered what works well in tight spaces when you don’t have the proper tools: emery boards!
I did a bunch of snowflakes similar to these in frosted acrylic, they come out nice. I am getting 24 out of a 12x20 sheet at 2.75 diameter. I’ll go use the rest of the sheets for smaller sizes now