I've rebuild 2 standard ct9's and a speed vision hybrid all of which i haven't had any issues with after rebuilt. These two vids will give you a rough idea of what to do as its pretty much the same... https://www.youtube.com/watch?v=PSZtP949JHU https://www.youtube.com/watch?v=wqXe0ln7-WQ you'll also need a rebuild kit, ( i would NOT recommend toyosport, got their kit for the first ct9 i rebuild and didnt use any of it as the parts are of low quality so i would look elsewhere for that). If you need any help feel free to message me and i will try and talk you through it