Inside Fillet Check Tool

I have altered the grate design from jrwknutson and created the opposite for inside fillets.
"This is a set of fillet curves from 1mm to 20mm in single millimeter increments. I was tired of guessing incorrect radii during my design steps. These are labeled with Mayan numerical symbols because they don't require any enclosed bodies and can extend through the entire print. Basically a dot = 1, and a line = 5. If it fails as a tool, it makes a fun fidget toy."