How to make your own cat scratching posts

Mr. Homegrown shows how to make a cat scratching post from some rope and lumber. He writes, 'Im so satisfied with the results that Im thinking about creating a integrated cat scratcher/USB charging station/cat perch using a twisty tree branch. I know, that sounds like a bad idea, but as Marshall McLuhan once said, If you dont like that idea Ive got others.'"