The alternative architecture considered is a four spool independent metering system in a typical Wheatstone bridge configuration, with the addition of another valve to allow regeneration when possible (Figure 3). In fact, this solution allows to eliminate the dissipation at the meter out section, to avoid the use of a local compensator because this function can be performed by the main spool opportunely controlled and finally to introduce different control strategies of the single valves in order to manage also overrunning loads, as demonstrated for example in