My press uses essentialy different diameters of pipe that sit on top of a flat adapter plate with detents. It was sold as a 4x4 ball joint press. I'll probably just use a 2" length of pipe and recess one area to clear the control arm. I might weld on some reinforcing where the two tangs on the control arm are.

I like deadblow hammers but have found that rusted parts respond better to the sharp shock of a steel hammer. I have a very heavy hammer with a short handle, like a stubby sledge, that works great under a car. Very little speed and distance required to provide a good impact as opposed to a ball peen that needs lots of clearance for a big swing.

Jorg