Step 19:Now with slice plane make the 2 edges. First edge for center and second edge create on the bottom of model. Like step 5 create a mirror. Select the polygon that show in the picture and extrude that about 0.03 and through chamfer edge smooth the new edge created by extrude
Step 20:Create a new rectangle with these parameters. Length=1.237, Width= 0.195, Corner Radius=0.076. Then with shape merge create a similar edge on the model that created previously. Then extrude new edge about -0.01
Step 21:Create a cylinder with these parameters:
Your work should be similar to this picture.
Step 22:Now create the following objects as shown in the below images.
Segments/turn: 40 or 60