"Last summer I used one of these battery-powered train motors (along with a battery pack and r/c controller and receiver unit) to upgrade my old 12v 1980s 7740 Lego train set to r/c battery power - but the addition of new carriages now requires *more* power, and hence *another* train motor! Oddly, I have been waiting for this item to come back into stock since Christmas 2017 - and it's now almost mid-April. Come on, Lego, give the paying public what they want! Get this item back on sale, pronto!"