AMOPSS- ammunition optimizing slingshot

This is a surprisingly powerful slingshot that takes about 15 minutes to make and uses everyday, around-the-house materials.  If you don't wish to make the modified version ( that shoots arrows), this works perfectly well as a standard pellet-shooter. I am not responsible for any accidental injuries.

Step 1 Materials:

- a Y-shaped branch, about as thick as two of your thumbs
- duct tape ( for the pouch, but you can use leather instead)
- 2 large rubber bands
- 2 small rubber bands (for modification)
- 1 keyring (for modification)
- 1 or more arrows ( for modification)
- a saw
- a pocket knife or razor
- coarse-grit sandpaper
- nylon cord (optional)
- wood glue(optional) or school glue
- 2 eyehole screws, about an inch long each
- a hole punch (optional)
- two  3/4 '' long bamboo skewer pieces (or other kind of dowel)
-  a drill and a bit smaller than the diameter of the eyehole screw (not shown)