Makes sense. I learned most about the 8ight T RTR from older Botajell YouTube videos. Really helped me out in the beginning. I didn’t know it was mostly 4.0 parts and thought it leaned heavily towards the 3.0. Either way, I’m sure even some 2.0 parts would fit, but as far as I know the 3.0 and 4.0 kits were a pretty big departure from the 2.0, so it makes sense that this RTR version would be based on the 3.0 and 4.0. I have 4.0 carbon shock towers on mine, 3.0 kit front and rear differentials, and I believe when I ordered spare arms and such via part numbers in the manual, it had me order 4.0suspension arms and such. Also, some parts on the 8ight T are proprietary to RTR, such as the stock differentials and plastic toe links, outdrives, ring and pinions, all sorts of stuff. But either way it’s basically fully upgradable to 4.0 specs which a ton of people have done on YouTube.