I basically made a belly band with one of the snowflake card bases by scoring it at 1" from the scored lines, which will fall on the back of the card base. I scored the right snowflake as directed in the kit instructions, and used a Dimensional to hold it down. I cut the snowflake off of the left side and butt it up to the the other half, using a Dimensional to attach it.
I cut one of the triangles off the ends, and adhered together using Liquid Tombow.
The first box I made had to much space around the belly band, and the second box was too tight, grrr.
I had to make another score line to make it a bit smaller, and trim the cardstock a tad, but it worked. You may be better at figuring 1/8ths than me:)