This is a sweet bazooka for the Davincibot.Which can be found here: http://www.thingiverse.com/thing:31496Hot glue a #4 finishing washer to the bazooka, such that the base is facing down. Try to center it as best as possible. I did not create a recess for this washer because I didn't want the accessory to get too thick.Hot glue a 5mm diameter spherical magnet to the hemispherical recess on the front of the bazooka. Make sure the poles are aligned by placing the magnet in a spare finishing washer while gluing in the magnet.Stick it on your Davincibot and pretend to blow stuff up!I have included the openscad file for you to fool with if you wish.Check out this instructable for more details: http://www.instructables.com/id/Davincibots-Create-a-3d-printed-modular-robot-toy/