All,

I am the author of the Cone Layout program (see pulserate.com) which
can calculate the layout or flat pattern projection of a cone with
tilted ends. I am currently working on a new version that can also
generate square-to-round "cones". I have succesfully updated the
finite element model (FEM) that is used by the program to generate the
layout: http://www.pulserate.com/sq2round.png

However, but noticed that the resulting layout is difficult to
bend/roll. Is it generally necessary to make incisions at the corners
of the squared end of the cone in order for the square-to-round cone
layout to bend properly, or did I just make a mistake in my model?

All suggestions are highly appreciated!

Regards,
Joris