Before you put the two pieces of the rail together, you need to use the lower smaller rail piece as a template – the lower half of the rail will fit snug against the base of the table.
Tips: If your saw blade is long enough and strong enough, you’ll want to clamp them together and cut both at the same time.
Even though this photo shows a compass, don’t use one for this piece. Use the inside of the smaller of the two rails as a template. Trace around it. You want to copy the imperfections onto this peice of hardwood so your rail will fit snug
This site has step by step instructions on how to build a racetrack poker table with whisper vinyl padded rails.