p=3-6 pt=0.7-0.9

Positives:
^^^^^^^^^^

        19: Split?  {no, just close tracks}
        62, 87: Crossing tracks, only one point removed
                {ok, bug in the intersection-remover, corrected, thanks!}

Negatives:
^^^^^^^^^^

        No problem. Remark: still there are many short tracks.


                                    Positives

 10 ++-**---------***---***------+-------------+--------------+------------++
  8 ++ **        ** ***** *      +             +              +            ++
  6 ++ ** ** **  *  ** ** *                                                ++
    |  ** ** **  *     ** *                                                 |
  4 ++****** *****        *                                                ++
  2 ++*    * *    +       *  **  **            + ***************           ++
  0 ***----***----+-------************************---**-----**+**********--++
    0            50             100           150            200           250
                                Number of points

                                    Negatives

 10 ++------------+-$$-----------+-------------+--------------+------------++
  8 ++$$  $$  $$$$+ $$ $$        +             +              +            ++
  6 ++$$  $$  $  $  $$$$$$$                                                ++
    | $$$ $$  $  $$$$     $                                                 |
  4 ++$ $$$$ $$    $$     $                          $$$                   ++
  2 ++$    $$$    +       $      +$$$          +  $$$$ $$$$$$$$            ++
  0 $$$-----------+-------$$$$$$$$$-$$$$$$$$$$$$$$$-----$$----$$$$$$$$$$$--++
    0            50             100           150            200           250
                                Number of points