Yes, this was all done with styrene sheets and rods. The accuracy is amazing, he even made both sides seperately in stead of duplicating it since it was first meant to be a one off. There were no plans made because it was done on a pre-existing toy. He said he would have drew up plans if it was all scratch built. But he had to measure it off the 1/48. Seems complicated but he's a seasoned pro.
NB4M has the 2 seater front all covered. I've seen what he's done and it looks amazing.