Sheet Metal Cone Pattern Generator

I've just put up a Cone Pattern Generator on blocklayer.com.
But I'm not a metal worker, so would appreciate advice on whether or not it's set up ok for sheet metal cone patterns.

http://ift.tt/1bNV0be

Enter the cone dimensions and it draws a full scale template to print.
You can also mark out increment points around the cone.
Enter the number of increments, (slant) height above base and diameter of the points to mark, and it adds them to the template.
It also animates with slider controls so you can see how the pattern changes as top and base width, and height are changed.
At the moment it goes up to 500 mm high by 200 mm wide. This fits pretty easily on an A1 size page, which OfficeWorks will print for around $4.
Hit the Print Diagrams button at the bottom of the page to create a PDF up to A0 size (841 mm x 1189 mm)
Is it worth while making it go up to the A0 size?

Thanks for any feedback.