Couple things 'bout using the fluxbuster. First, put the stylus in the groove/on the LP before fluxbusting. Two, disconnect the tonearm leads before turning the fluxbuster off/unplugging it.
While the Sumiko is a good unit, the Aethetix and Audiophysic fluxbusters are far better devices.
Of course, that's leaving out the argument that you should check with each cartridge manufacturer before fluxbusting. There are some such as van den Hul that don't recommend fluxbusting. Personally, I've never had a problem with using a fluxbuster on any of the Scantech designed models.
