|Start at the beginning|
|Using another half of a clothespin, push the top spring arm back toward the notch you modified.|
|Hold both pieces firmly. Not that you will die if it slips. Maybe you like minor finger abrasions. Knock yourself out. (Not shown: Oversized cartoon mallet.)|
|If you find that the spring arm won't stay cocked, you need to further modify the notch. You may need to make the notch a little deeper, or make the flattened edge even flatter, or both.|
Here is the lower half of the gun with the spring in the cocked position.
You are ready to test your trigger assembly...