What is the best method and process for routing accurately spaced grooves in boards for a house entryway system? Ever seen the way that people create those evenly spaced grooves that look like a column in a board? Picture 5 or so grooves next to one another down a board all starting from the same place and ending at the same place. The board usually has a plinth block at the bottom and some sort of pilaster on top across the doorway. I've seen the same look on mantel legs and even on furniture.