Hi all,i am johan gouws from south africa.Retired engineer,as from july 2017.projects lined up is a air hammer and press for my blacksmith workshop.At the moment i gather al the info required to accomplish my dream.i will post photos on the progress made on a weekly basis.in need of drawings for the hydraulic system,using a pump with output 15 GPM And 2 cylinders 85mm O/D with a 400 mm stroke.