im gearing up to make a run of 2004r output shafts.yeah yeah we dont break them bla bla bla.anyone interested in them let me know.yes they will be necessary as we are set to release all 3 sets of planets in an 8 pinion configuration to allow this trans to approach the 1000 horsepower level,with our 2.40 planets of course.shafts will be 389.00 and carry a lifetime warranty against breakage and or twisting.i will need a total count by the third week in july.