I am currently racing a K-3 which is just a little more updated than a standard 7.5. It's still a good buggy, I am only having a little trouble getting it to steer as well as I'd like. Durability has not been any issue for me running an S7 and Werks B3. I am using a Parma body that fits most popular brands (except Losi) and it fits quite well and has that somewhat boxier look of the classic Kyosho's.