The present invention relates to compounds of the Formulawherein R1, R3, R4, R5, R6, R7 and R8 are as defined. The apparatus is used to simulate a fly casting experience, with the limit stops adjustable to simulate long casting motions, short casting motions, and casting motions therebetween. Each possible bin includes one or more of the values. The first connector enables communication with the primary node via the first pair of communication wires and the second pair of communication wires. The classified product passes into a chute to one side of a separation plate.