I think they are cut circumfrentually, as in pi-r squared, KISS principle, length wise! Opps, cake are square, pie are round! Pi-d! Wrong formula, right idea, lengthwise cut!
![Evil >:D](http://www.primitivearcher.com/smf/Smileys/default/evil.gif)
so you get long strips, then use a vise grip or channel lock to stretch and wrap! On the other hand, I haven't had the opportunity to try that method!
Hawkdancer