The video tells you to make a mark 3/8” below the previous mark, but never showed a previous mark or gave a measurement for that mark. When he is putting the bracket for the rail in the back he is making measurements but does not indicate what they are.
The video tells you to make a mark 3/8” below the previous mark, but never showed a previous mark or gave a measurement for that mark. When he is putting the bracket for the rail in the back he is making measurements but does not indicate what they are.