The Wings Maker’s version of the J-11B came as what they call a “pre-assembled” model which means that all of the servos are installed with the linkages connected and the brushless EDF units are also installed. The model features mechanical retracts which are also pre-installed. To complete the model you are required to supply a pair of 40-amp ESCs, two flight batteries and the radio system. The model can go from box to air in a matter of a few hours. It is a great model if you are looking to get into a twin EDF jet.