Impact Sprinkler Mark 1

Hello World,
The last couple of days my life has mostly been revolving around Impact Sprinklers! I think that Impact Sprinklers might be the coolest things since sliced bread. They are also most certainly printable. And, given enough work, probably actually useful.

My fascination started when I saw: http://www.thingiverse.com/thing:10127
I have never been in close contact with an actual Impact Sprinkler, but believe me when I tell you that I have seen many YouTube-clips of them in action. I still can’t figure everything* out thou. I have not yet fully understood the concept of how you get the sprinkler to reverse the cycle so this is a 360 degree sprinkler.

This is my first thingiverse upload – it’s a scetchup file of mainly 2 parts: a sprinkler head and a spoon-arm (or whatever the technical term is). In addition to these parts you would need a rubber band** and a bolt. The bolt in order to get the two parts to stick together. And the rubber band to force the spoon-arm a