For this particular set, available configurations and components consist of:
Scale 1:128 Twin rudders, extended shafts with tubes and thrust collars, "A" frames, L & R 4-blade propellers (1 each) L & R 5-blade propellers (1 each)
Scale 1:96 Twin rudders, extended shafts with tubes and thrust collars, "A" frames, L & R 4-blade propellers (1 each) L & R 5-blade propellers (1 each)