#declare Cranx=difference{union{//disc{<23,-2,11.5>,y,3.3,2.6 }                // top cranx gear 
                                object{RMCRing rotate z*90 translate<23,-2,11.5>} 
                                cylinder{<23,-2,11.5>,<18,-3,16.5>,.33 } 
                                sphere { <18,-3,16.5>, 0.33 }  // end of sphere   
                                sphere { <23,-2,11.5>, 0.33 }   
                                sphere { <23,2,11.5>, 0.33 }
                                cylinder {<23,2,11.5>,<28,3,6>,.33}            // and cranx   
                                sphere { <28,3,6>, 0.33 }                              // now with ballsy ends!!
                                cylinder {<23,2,11.5>,<23,-2,11.5>,.33}  //bottom bracket (Ashtabula style!)
                                 } //end big Ashtabula chrome-hunk... 
                                cylinder {<28,3.4,6>,<28,1.9,6>,.17}
                                cylinder {<18,-3.4,16.5>,<18,-1.9,16.5>,.17}        
                                  texture { MyChrome }}