I have a variety of tools, including a CartAlign and the old Dennesen Soundtractor. But my go-to gauge is a WallyTractor, which has a mirrored surface so that you can actually align the cantilever. I also use a digital VTF gauge and a digital speed gauge and have an assortment of test records from Shure and Ortofon. Hand tools are just basic needle-nose pliers and jeweler's screwdrivers.