Thank you to everyone for supporting my claim of ownership of this design. I really is different than any other method. Also, the head is so smooth because I used clay and a special tool. I also baked the clay for a long time at a very low temperature ON THE HEAD, so there are no gaps between the head and filler.
Oh my god! Oh my god! This is amazing! The design is ingenious! And using a lightsaber hilt to attach the leg makes it your design! But anyway, the head connection (and the head) is amazing. And that's all I have to say! ~ James :D