So while surfing different types of rulers, I came across this youtube video...really cool Idea, but thinking one could use a normal larger square ruler somehow...will have to put my thinking cap on for this...but in the mean time is you are a gadget person like I am, take a look at this video...
http://www.youtube.com/watch?v=vHDuCwqCRvI
Just wanted to update that on heirloom creations blog they demo a different ruler every month....go on over and surf around
http://blog.heirloomcreations.net