The GT SONIC-T2 is the smallest machine in the T series, a two litre bench unit that takes the same chassis as the smart S2 but swaps the touch panel for a pair of illuminated rotary knobs and adds a two stage power switch. The 150 x 135 x 100 mm tank is sized for optical ferrules, dental burs, jewellery settings, small nozzles, circuit board offcuts and lab glassware, and 40 kHz cavitation lifts polishing paste, cutting oil and oxidised film out of slots and blind holes that