FreeWing L-39 Albatros...installation of the receiver, stabilizers..relocating the distribution board... arranging the cables... gluing the holders of the additional tanks... connecting the ESC to CH3 and the reverse control to CH9...reprogramming the transmitter..adjusting the deviations ...test .....OK.....it is still necessary to test and adjust the correctness of the stabilization functions and it is ready for flight... :-)