[Edges of model aren't printing (gray in Cura)]

Thanks very much!  If anybody knows of a way in Tinkercad to create a triangle with a consistent line width on all sides, let me know. 🙂  I will go back to the design there and see if I can make those edges thicker.

[Edges of model aren't printing (gray in Cura)]

I'm trying to print out a truss design (daughter's science fair project).  For the life of me I can't figure out why the 2 outer edges aren't printing.  Cura decided not to for some reason.

All of the lines are the same thickness (designed in Tinkercad originally).  It's supposed to be a trapezoid but the sides are still grey.  Any pointers appreciated!

 

Equalateral Truss With Supports.3mf Equalateral Truss With Supports.stl