Squareness Comparator - Build Your Own: Part 1 Base and Column

Part 1 of building your own squareness comparator. An essential tool in any machine shop. Check out making of tools used in this video: -Boring bars: https://www.youtube.com/watch?v=FwKr_87fT8g&t=1s -Mini machinist jacks: https://www.youtube.com/watch?v=kO_f5zqulnc&t=45s -D bit grinding/Deckel Restoration: https://www.youtube.com/watch?v=p-Z9YPFRiOo&t=863s