Hornby R7399 OO Scale Vacuum Pipe Magnetic Coupling Pack 20mm Puzzles 1500pc The EzRun 3652 3665 SD G3 Team Associated RC8T4 The EzRun 3652 3665 SD G3 features an improved water proof sensored cable interface and an upgraded sensored mode to achieve motor temperature protection and perfectly matches the EzRun MAX10 G2 ESC High torque output starts engines up to 1 This pack does away with the somewhat intrusive tension lock coupling and replaces them with something that more resembles vacumm pipes as you would see between coaches on the UK mainlines These couplings also hold the coaches closer together than has previously been possible