I'm not sure the material is viscous enough for that, it might have a certain degree of roundness regardless. In my head the shroud is directional, which means

I'm not sure the material is viscous enough for that, it might have a certain degree of roundness regardless. In my head the shroud is directional, which means you'd need another actuator at the nozzle. If he's using off the shelf cnc software that could actually be complicated to implement.