Extrude the mouse wheel and in the Direction1 and Direction 2 options set them to offset from surface. Create the extrude .5 mm offset from the inner walls of the opening. Uncheck the box that says merge result. SWX by default tries to chunk features together into one solid mass whenever Solid features are used. Most times this is preferred but sometimes you might might to makuse of multi- body features (as in the case of the scroll wheel.
I figured out how I wanted the ribs to look like in the sketch in the folder "Rib sketches" Extrude a surface that goes past the outer surface of overmold
The curves in green are the curves on the surface of the overmold that you want to map your gripping ribs to. as you can see there are four ribs to be mapped by means of the deform tool.
Use the Copy/move Body Feature to make 3 copies of the revolve. Do not specify a displacement (all the copies will overlap and look like one revolve even though there are 4 bodies). This is so that we can use the centerline of the Revolve sketch as an initial curve
(Ignore the surface extrude . You can hide it)
The Deform tool uses curves to map your geometry to curves. The initial curves map to your geometry, and then Solidworks interpolates the change in geometry from the change between the Initial and Target Curves