This is how it turned out:
I cut down the metal trigger rod of an Sm3k (blue) and I got this. I also added a spring from my box of random springs that fit just tight enough on the rod to be stopped by the dent thing in the rod.
Some more closeup pics:
I used a PVC that has an airtight fit with CPVC so it worked out well.
To move the grip to any of the different spots, you simply pull down the little metal rod and move it.
Different location options:
Feel free to ask any questions or make any comments/suggestions.
Edited by cheesypiza001, 11 October 2009 - 11:46 PM.