i have to say, i am amazed that anyone still found it! :lol:
but i've used the method a few times and it works every time. i also use another even easier method. i'm trying to remember what i called it.
if you search square in a square you'll find it - or search my listings. the other method eliminates the taping on the board. also you don't have to mark up your mat.
eh! they're both easy! why bother?