I came up with a way to make the 2 dental file pieces to fit into the lower 2 key slots. I found a volume know that had a spline in it close in diameter & used epoxy putty to mold the pieces. Did some hand filing to get the groove into it. Used epoxy to glue attach them to the helmet.
Also did some work on the inside of the helmet getting a ring mounted to keep the helmet firmly located on my head. The head ring was from a face shield. Put some threaded T-nuts in for mounting the face shield. Need to add a few more up near the top of the eye slit. Figured I would get this out of the way before I start painting.
At this time I am either going to use a green shade 3 or shade 5 for the visor. Bought these earlier this year. Did buy a dark smoke gray as well at the time but used too much of it in my wife's Boushh helmet. The shade five was also used on her helmet as well but I have plenty left. In light of recent discoveries concerning the visor color I am going to order another dark smoke gray for the visor. I have a very good template for the visor so it will be very easy for me to make another & switch it out. Been using a piece of cardboard to keep the helmet tied together.
Plan is to start painting the helmet this weekend.