In this video I will run you through designing a wasteboard using MDF, and Tee Nuts using Vectric's V Carve Pro, and my Shapeoko 3 XL CNC.

14/20 T-Nuts https://goo.gl/bRQZfS (Affiliate)
D.H.S. 1/4"-20 Tee Nuts - 4 Prongs - Zinc Plated - 100 pcs