Has anyone got any experience with using rapid prototyping / 3D printing for creating their own customs? -What software do you use? -What file format do you export into? -What rapid prototyping method do you use? sintering / CNC / whatever? -How much tolerance do you put into plugholes and tabs and whatever else on the parts? -How did you come up with your transformation mechanics in the first place? (Assuming you've designed your own complete TF) -What's the best way to get the individual components produced ... 40-odd separate pieces or one-two super-complex parts with all the itty bits on a sprue?