I made tutorial, how to paint any vector design on egg surface. Heck, i even painted some photos by suing same method.

So this is the tutorial i am talking about.

https://www.youtube.com/watch?v=qxlUreNG65E

Every thing started with idea from my work. I had everything i need to do it, just need to assemble it. So one weekend i cracking, went to "Home Depo" type supply store, get some wood and feet's.

After cutting wood to size, i mounted 3k revolution 5Nm servo motor that is 6400 counts per revolution to aluminum angle and screwed it to base

5 minutes with Solidworks, and spring loaded egg holder was designed. It take multiple attemts to create Z axis. First i made it with small servo from DVD player, it worked, but it had no torque, and it as jamming at random places. Solenoid from laser helped here. Big note, use oil based marker,as well as egg rotation axis must be higher that pen