I used Rafal Fett's template. I had some nice sized, scrap, 3/32 of an inch thick styrene sheet I bought for little or nothing from a sign shop, but I had to join two pieces together. I used a wood burning tool to score the lines and make those bends. For the shoulders, I simply used a blow dryer. I then build a jig from scrap wood, screwed it down, and added shims and more heat to get the shape comfortable. I partially fiber glassed the inside, avoiding all the screws. When it was cured, I removed the screws and added the final fiberglass layer. It did not bond as well as expected, so I shot in super glue along the edges. It needed a little Bondo asd glazing putty. WOF's template in at least to inches longer and 2 inches wider at the bottom. I think Rafal Fett's is more accurateI will update as I go.Thanks Rafal Fett. The helmet is based on his templates too.