I just stuck cheap Traxxas hexs and pins on it and went with 3.8 Proline Badlands, awesome traction on nearly all surfaces and nice for jumping - I had heard of drive pins backing out too so I blue thread locked them all from the start. I've abused the crap out of mine at a BMX track and after about 6 packs on 3S I've no parts to replace....yet. It is however a bit sedate after a Traxxas Slash 4x4 on 3S, but I like how it handles for bad terrain days