The wing machine is ready!

I've finished putting the wing machine back together, and the only issue so far is that the Y-axis motors drive the carriages down for positive displacements, which means the wing cores get cut upside down. I know I need to switch two wires on the drive board, but I'm not sure which... Aside from that, it works beautifully. I need to buy some foam, rig up the hot wire, and start cutting! Location : Beauvais, France