After the very successful and popular Tröpfler of Wotofo, the Troll V2, the further name use for a self-winding tank evaporator from the same house was close. Apart from the name, the two evaporators do not have much in common. Anyone who dares to work on a self-winding machine for the first time and wants to get away from finished coils, however, is well-advised with the Troll RTA. The 1-post design and the fairly large waders should be good for beginners, too. With a diameter of 24 mm and a tank volume of 5 ml, the dimensions are also quite compact and can be found on almost any battery carrier.