I alreadt have the OS .18 TZ turbo on the way for my XXX-NT. I know this is going to be uncontrollable power but I am looking to have my XXX-NT break 60 MPH on the gun. I am going to upgrade the tranny with an aluminum casing and all aluminum gears so it can handle the power. The only thing I am still going to be worried about with the engine are the stock cvd's so If I break those I am going to get either the MIP ones (have seen several break) or the titanium ones. I will let you guys know how it goes and I will also let you know if I am capable of breaking 60 MPH. Should be a close one!