Just a quick note on this excellent tool - the method of calculating the penalty is a little flawed at the moment. To resolve a couple of the problems, save the tool locally, and then edit the hmtl file in a text editor.

You want to replace this:

Code:
  //dst =  5 * Math.round( ( edst - 10 ) / 5 );
  dst =  5 * Math.floor( ( edst - 10 ) / 5 );

  if(dst < 0)  dst = 0;
  if(dst>=75) dst = 80;
with this:

Code:
  dst =  5 * Math.round( ( edst - 10 ) / 5 );

  if(edst < 15)  dst = 0;
  if(edst>=86) dst = 80;
That should resolve a few of the issues, but unfortunately not all.