this product has been taking by aerotech because it will go CATO in your rocket only TWO THREADS on forward and aft R&D was at springfest tripoli las vagas 3/21/15 motor went CATO along with aerotech G FORCE rocket head of R&D said there is a problem with 29MM case and 24mm case they took my case 29MM said for research and would get me a new one I PROMISE you to replace it NOPE not yet liars wait for new case with 4threads as said by HEAD OF R&D SAID dont wast your money or your ROCKET