DtM-v3.0 Face Shield Smoother Faster Remix

Fixed a few things in the original to make it easier and faster to print.

The Fusion 360 original model contained a few things that made printing of them slower than necessary.

The loft that created the shield contained some discontinuities as well as being non-constant thickness. This led to extra printing time due to travel and retractions.

This remix also fillets some corners for less ringing and smoother print. Also, horizontal edges are slightly chamfered to make the head band not as sharp for better user comfort.

Also included is Prusaslicer .3MF file with settings that enable me to print these in about 55 minutes using a printer with Volcano hot end.