ALL these egg's are made for Annoying Eggs. HOWEVER, they can be used with or without the "annoying" parts. They can just be threaded together eggs.
A few of these models, (Dragon's Glass Egg & Fin Egg) I made a specific 50% version so you could print smaller eggs...
Royal Egg - This one I have done all I can to make it as minimal material usage. I made this big and fat on purpose. To look "royal" as possible.
Layer 2 is a 2 piece model. This is very tricky... So Layer 3 needs to be done first. Then you need to print the Layer 3 Cap.. Install the cap, and then take the two pieces of Layer 2 and it takes a little wiggling to get it to go together.
The two parts of layer 3 slide togehter, and with the inner egg in place its a little tricky. You need to take the "under" side of the Layer 2, and tilt it back at a 45 degree and then slide it together.
once together, you can spin the inner egg until all the bolt holes line up. Once they line up, you can then start putting in all the screws. there are 57 in this model. Once in, the bottom tool threads inside of Layer 2.