Practical test: Vicon Andex 1503 four-rotor rake Four-rotor rakes would appear to be the way to go for larger foraging contractors – that’s if additional size is taken as an accurate barometer of future machinery buying trends. Main plus point, of course, is that these giant twizzlers represent the obvious approach to satiating considerable SP forager appetites. We test the Vicon variant, the 15m wide Andex 1503