*3tab,Three tab shingles   TIP509
  0, .3,0,    .25,.5,                   .4,-.1,.4,-.1
 90, .25,.05, .5,.25,                   .45,-.55
 45, .2,0,    .5303300859,.1767766953,  .07071067812,-1.343502884
135, .3,0,    .5303300859,-.1767766953, .07071067812,-1.343502884