Ok, here is the question, How have you all been setting your traps? For me this is half the battle (well, at least a fifth). The following shows the method that I've developed, but I'd love to hear any tips or tricks that you have come up with.
Note: I refer to the pieces as the upright (the vertical piece), the lever (the diagonal piece), and the trigger (the horizontal piece) I'm not sure if there are proper names for them, but these make sense to me.
Step 1
I prepare by holding the upright and lever pieces in one hand. The upright is being held in the notch by by thumb, index, and middle fingers.
Step 2
With my other hand I lift the weight and place the lever under the edge.
Step 3
In this step the upright is supporting the weight. I am actually pressing down with the heel of my palm. I keep my index finger looped around the upright to hold it in place. With my free hand I grab the trigger stick.
Step 4
I position the trigger by mating it up with the upright first and then fitting the end of the lever into the notch on the trigger. I loop my other index finger around the upright as well to hold everything secure. With the trap held as shown you can move the figure 4 around to get the balance right. It's not easy to see in this picture, but the entire figure 4 is lifted off the ground.
Step 5
The final step is to let go of the trigger stick. With my other hand I'm pressing down on my thumb and applying a bit of clockwise torque to help keep the trigger locked in place. I check the balance and carefully let go.
Maybe this was a long winded explanation to something that you all find simple, but to me the practice setting traps have been as educational as the practice making the traps.
(and yes, I know I'm scrawny. That's why I call myself CoyotePhysics, not BearPhysics)