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I've never built a hydraulic system from parts before. Current parts list: 16 GPM 2 STAGE HYD PUMP 6x15.5x3.5 DA HYD CYL 1 SPOOL 20 GPM PRINCE RD-2575-T3-ESA1 SA OC VALVE 1/2 NPTM x 1/2 NPTF 90 SWIVEL SAE 16M x 3/4 NPTF 90 SWIVEL Four questions: 1: The outlet port on the pump is only 1/2". The inlet ports on the cylinder are 3/4". Is this too small a pump to run a 6" bore cylinder efficiently with good stroke speed? http://www.surpluscenter.com/Featured-Items/16-GPM-2-STAGE-HYD-PUMP-9-7503-16.axd 2: I bought the wrong spool valve (crossed out a