Alert box with 6 curve values at each curve end.
It would be nice to have a persistent floating box?

I'll have to try for Normal and BiNormal, and torsion...

For a circular arc, 1/radius = "K" curvature. The curvature is the length of the displayed "position vector," = sqrt( x*x, y*y, z*z ).
4.9999999... ~= 5 :-)

Paul's online notes is helpful with reviewing the mathematics, and has pdf downloads.
Chrome web browser displays his site better than Internet Explorer does.

http://tutorial.math.lamar.edu/

- Brian