Step 18: Create Sketch for constrain
2. At the top of the circle make a line that is "0.1" inches down.
3. Make a line from the lower point of the line you just made, over to the right at ".025".
4. Do the same but in the other direction now.
5. Now put a line up from both endpoints to the circle's edge.
6. Delete the center vertical line that runs up and down.
7. Click the "Trim" tool and then click the small arc.
8. Finish Sketch