Vin, The PST J600 is a MW54 12 lb thrust turbine, I would not recommend this for the Avonds F104 it is a bit small for this Avonds model, the one in the pics was not a new model and had flown numerous times before the Mangalore meet. From the flight I saw the F104 is best suited to 20 lb thrust + turbines. I believe the TJT3000 in this model was derated to approximately this thrust level. It certainly moved out fine and was very quick... heres a couple of pics of it taking off and climb out.