The large working surface with single portable grid system, design for fast and easy components interchange or circuitry re-arrange. The vertical panel provides easy access to the components adjustment and connection which are mounted on the panel. Each of the components is identified by an appropriate hydraulic symbol for ease of circuit interpretation. Most of the components on the unit are all real industrial ISO CETOP components; the very same components used in industry every day. This real-world approach allows the student to learn what those components look like as well as how they operate. All necessary connections are made with hoses and quick disconnects. No any special tools are required to arrange circuits. Simply plug in the components on the grid systems needed to arrange a circuit.