Alan, like I stated before you have made a "where do I even begin" scratchbuild into a pleasure to build from the start. If you follow the plans and other members advice on the forums the helmet goes together without a hitch. You have done all the hard work and research and we are the ones who are benefitting. I wish you luck with your own helmet and thanks again.
I will probably make the ears out of the for sale signs and sheet styrene like the rest of the helmet with possibly an aluminum mount for the stalk and rangefinder.
The upper cheeks were the hardest part of the forming process. It is actually four pieces per side. I tried one piece and there was no way. Too many conflicting curves. I cut the original piece into four pieces (back corner, upper corner, middle curve and finally the lower cheek. If you look carefully you should be able to just make out where the lower three pieces are connected. I use super glue for the initial tacks then used Pro Weld liquid cement to join the sections. I reinforced the joints with a bead of super glue and accelerator. Thanks to everyone for the great feedback and I will keep you posted with my progress.