About this 3D model

It have more than 145 parts took my 5 months to model.>..<!!! Design Principles 1.Suitable for almost all of the 3d printer. 2.Use print and material features to improve print quality. 3.Save material and printing time. 4.Respect the prototype. 5.Almost no glue when assembling the model, assembled with the structure. Thank you! Enjoy!