[RCP57]

For my volvo we used seemless stainless tube for the barrels, brass for the pistons, tool steel for the rods, and aluminum for the end caps. To cut the o ring grooves in the end caps we used a modified internal thread cutter. You want to cut your o ring grooves just deep enough so that there is some friction there but not too much. These are the only pictures I have of my setup. It is probably easier to use brass and solder it together but this is the way my father inlaw did it and it works well.

Reg