"Effortless Cabinet Section Spacing: A Foolproof Method for Perfectly Aligned Cabinets"
Just a simple and strait forward way to get your panels spaced evenly when you are doing cabinets.
Here is the math from the video
Total inside width - (Total width of panels)/number of spaces in the span
Example: 100" wide space, 5 spaces, 3/4" thick plywood
100-3=97
97/5=19.4" Per section