Here are the latest pictures of William where I used three sets of "cumbrushes" as a ball stretcher.  The first set of brushes (the ones closest to his body) are regular nylon-bristled hairbrushes with the handles removed.  The next two pairs are METAL bristled styling brushes with the handles removed.  Each set of hairbrushes is joined at the top and bottom by 3-4 smaller rubber bands twisted in a figure 8 pattern.

The dishwashing brushes were seen in an earlier picture, and have wooden handles that can be used as levers to increase the amount of pressure applied to poor William's scrotum.