Two other uses for the stinger I have seen (in the UH-1):
1. For climbing up on and standing on when you want to check if the 90 degree gearbox cap is on properly (probably not very good for it)
2. As part of the question sometimes asked by anally retentive check captains about how many pieces of wood there are in the helicopter (eg cork throttles, plywood false floor) - it's got a wooden plug in the end of it!