MTS, I think you treat it like a pantograph. It would lay on the back of your longarm, just like a paper pantograph does, just that the stylus would fit in the grooves. The only thing I can't figure out is, what size are the boards...to me it looks like you would have to buy several boards and connect them to make a long continuous panto. Hummm kinda would get expensive I would think. I guess you could just keep moving the board, but having to make sure it lines up all the time wow I'm not so sure about this...it looks like a great idea, but to me it would be a huge expense....JMHO