About this 3D model

I drew this globe in Corel Draw , the globe have 250mm diameter and consists of seven rings and twenty four stringers to fitting. I did the drawing to be cut in 4mm material. Remember, if you think about increase or decrease the drawing so you must use a material as thick as the rabbet is. The result is a solid structure, it don´t need be glued. Tube link : http://www.youtube.com/watch?v=zzGxyOua6mQ