Squirrel Bar - The Nutty Bar - X Carve CNC project, Thinking outside the nut! Building a squirrel bar is traditionally done looking like a box. I wanted to do something different. I took on the challenge to design this and carve all my pieces needed using the x-carve by inventables. V-carve was the program I designed it in. I cleaned up the pieces using a round over router bit and sand paper. Other than that. Everything was done with the x-carve.