Review on Premium Volvo Ball Joint Installer/Remover Kit: CTA Tools 4019 - Simplify Ball Joint Maintenance! by David Thomley

Expensive but makes removal and installation very quick. I borrowed a slide hammer from a parts store to use with adapters. It takes about 5 minutes to remove the old ball joints and install new ball joints. I spent most of my time getting the car into position and lowering the controls (use a sturdy ratchet strap, this is much easier than fiddling with crowbars, it's a Volvo recommended practice).