You use a D40 with 17-55mm? Glad your strap didn't break! You can add a hand grip anytime, CP is selling the grip by Camera Armor for $70. There're other brands too.
CP? ok, will go check it out.
It was challenging as the D40 isn't v big, so the grip isn't fantastic. Then the sheer weight of the 17-55 shifted the balance fwd, and the zoom ring is closer to the cam than the focus ring, so the left hand wasn't v useful in supporting much of the weight either. 2 days later, my fingers are still hurting