For the non CAN bus joints we use the special tool.It is a availible from AST.I think that Euro Car Parts sell them also.
Only use original ball joints as I have heard bad things about the others.We do them on the car,just split ball joint and have somebody hold the hub out of the way.Boths sides will take less that 1 hr.
In the early days I tried it in the press but you cannot press it in easily without a special cup due to the design.(or get the arm off quickly)