Nice! I find the guide a bit confusing, as i cant work out what the grey/white bits of the template are respectiveley, and i am very confused as to how a dremel can make large designs, as opposed to thin lines, but i may use the school laser cutter, or have a look at some more guides!
EDIT: i now see that the grey bit is the template itself, bu then what are the white bits? and how does the dremel get at the perspex, as surely the template's grey/white area is in the way.
SECOND EDIT: ooooo.... is the grey bit another sheet of perspex? which is then stuck behind the orginal window? then the white bits are card to prevent cutting? am i right or wrong...