Traxxas just released new X-MAXX and XRT ultimate versions. Someone did a review on the X-MAXX but I forgot their name. I will find the channel here in a minute. From what I have seen and heard, the aluminum upgrades made the X-MAXX weaker. Here is the video that shows one of the issues with the new versions of the truck: X-MAXX Ultimate. Here are the links to the cars on traxxas’s website: XRT ultimate link and X-MAXX ultimate link. IMHO, they are asking too much for them and it would be better to go with a kraton. The price is 1,499.95$ for a supposed 1,000$ in upgrade aluminum and performance parts.