Took me a while, gimp hand and all, but yeh, its on there. I had to shave down the nub that is supposed to fit between the cables so that it fit. Then the lock was sliding over and sticking on the grip, so I just zip tied it to the housing. I will probably either take it off after the rally, or drill and tap the throttle housing to fit a small screw to keep it in place. Right now its adjusted so that it snaps back with no problem, but locks when I press the thumb lever.
Oh yeh, and check out my Invader Zim wristband.