Fri, 04 Apr 2014 17:15:25 -0700 Pierre-Yves David unbundle: extract checkheads in its own function
(0) -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip