sketch/array on helix surface?

Hello.

Attached is a picture of what I'm trying to accomplish in Solidworks.  Also attached is part drawing of what I've come up with so far.  At the end of it is what's suppose to be a plastic strip bolted to the face of the screw.  I want to show those little round brushes coming out (about 3/4" long).

How would I achieve this?  Is what I've done so far the best way?

Any input would be appreciated.

Thanks.

SolidworksParts And Features