Dial on our crock-pot broke so we worked up a new one. We used the Speed Dial Knob for Ulticontroller as the basis for the dial. The arrow comes directly from the Reddit Upvote/Downvote Button Enclosure.The semi-circle hole in the back of the dial is sized to the piece that we need it to fit on. You may want to flip the dial 180 degrees and print a few layers of the back side with the hole so you can test the fit and scale the dial as necessary. Once you get the dial fitted, orient the arrow and glue it in place.