What great pics! Felix's H is in almost the same spot and looks very much the same. His is really starting to fade now, too - he's 28 months.
Me - Aimee - Spot on liver
Elliot, 9/20/06 - H on back (nearly gone)
Felix, 7/28/08 - H on forehead (in involution)
Taking the 'wait and see' approach, for now.