Twist-Lock Stamp + Comfort handle

This is a lil tool I made on a whim. For the following project, the only thing you need is a pen spring cut in half, thus you can get two stamps per pen spring. All of the pieces should be oriented upright (length going upward or flattest face downward.) The main stl is the operating configuration, the only thing missing is the spring. 

Things you need:

1x Pen spring (you'll be cutting it in half)
a few grams of filament
maybe a drill, and a lighter/heat gun if things are out of tolerance