Not a long-armer myself but curious.
Is that "board" adjustable to a repeat length and width of your choosing?
It's a neat looking all over design.
eta: Never mind.
http://www.rns-design.com/#
Interesting business. So instead of paper pantographs in the back of the machine, you insert the stylus(?) and run it through the grooves of the board from the front(?) of the machine (if I'm understanding the pictures).
Cool.