The egg gun is printed in PLA, 220C and 0.2 Layer  In file Egg_gun_2014, it is me original, which tower was but too weak so I made him new. Is the black part of the file Egg_gunaufsatz on the images. Too bad that you no can upload videos, in a video, you would see the function better. It works also with raw eggs first  design from Thingiverse