Studio Hollow core door panel, ripped to width and resealed #workbench Posted on 06/22/201606/22/2016 by Jason Barre 22 Jun Jason Barre I wish the paint was calling for me but it's not so instead I built a manometer. This hole represents 8+ hours of drilling with a underpowered hammer drill and a dull chisel. 5" of reinforced concrete is no joke.