Had a ET back in the day, ran 7psi low boost and 14psi high boost, I bet you know which was run the most......... Went thru 3 gearbox's, they are shite!! The Tx3's arent too bad, but always remember Jr who used to work at ET back back in the day with Marky, he had one and shat the box out also, unless you put a 4G Evo motor in them, then they rocket, was a black one out at Mallala the other week............