MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
the top curve is a 15 inch diameter on the one I printed. This can vary from print to print and depending on how you glued it together. I haven't done the visor part quite yet. Best bet is a round can and a heat gun. Once you get the basic shape, you can use the heat gun to get it all exact shape. then trace the outline of the opening with a marker of some kind. When you cut the opening, make sure you leave enough "plastic/material" so you can sand it down to fit perfectly. I'm still working on fine tuning the design and sanding mine smooth so I can do molds. I will upload a template of the visor that can be printed in an hour. Thats the one thing I forgot.