I know a little - I've had two walking foot machines and 3 regular industrial machines. I was foolish and got rid of my ancient Singer WF and got a brand new Consew because it had reverse SPANK SPANK SPANK - That one manages to get bobbin thread wrapped around the shuttle on a regular basis and the only cure is to remove the shuttle from the shaft. It was how I learned to do timing. What comes apart goes back about the same. Industrials make a stitch just like anything else. The timing, tension work the same - a walking foot just has extra foot parts. (I saw a really cool old one in Florida - it was set up on a treadle. The man was sewing Alligator hide - making all kinds of stuff with it.) If you understand how a sewing machine works you should be able to figure out most of it - everything is bigger and tougher - some set in oil pans some don't. They sure do turn easy.