|  | 
      Option B positions and sizes the risers so that the as-cast
        cluster of couplers can rest on the tabs duringshake-out, rather than on the
        risers. This could damage the coupler tabs, if they abrade against the support screen.  
      The four couplers on the corners are fed by only one riser
        each. This gives uneven metal feed into those four components.  Go back to the
    riser page and select an alternate design. |