That's really helpful and I appreciate your detailed reply. One follow up question for now: why use the needle valve instead of sending fluid to the auger and increasing pressure on it to the stall point? I know the valve would give me better control, but every component I add makes things more expensive. By the way, this is an old machine from when Bobcats were yellow. The main relief is supposed to be at about 1800 psi and the flow rate is supposed to be 11 gpm. Thanks again. Charlie
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