Dear KGG
Thanks for Your reply
pls look at my photo below, this "onewaywheel" blue arrow can be activated by pressing the "red arrows" it's a rubber bottom, and here is what it's look below
Reverse, 2'nd photo in the lever that the yellow arrow are pointing at, it go reverse by pushing it down, and stitching length are adjusting by a shiny nut in the lever,, I hope it make any sense 🙂