It’s nice to have these blog posts: https://www.playpiper.com/blogs/news/how-to
But… these posts do not include any information on how or where someone would order the parts to make the project.
Ok, buy a motor, or two motors. What kind of motor? Where does one buy these things? How does one know what to order?
Keep in mind that we’re not all Electrical Engineers with a cabinet full of components waiting to be used.