If you crash too much it won't matter what car you run. If you can run consistently clean and fast and understand setting up a car and not just putting a setup on it, you can be fast with most cars and may benefit from the improvements in a new kit. I run a classic B44 with V2 shocks and BB springs and it works just fine - the car can still run better than I drive it. In short course BB shocks were a next level upgrade, but the SC10.2 front end is just different, not necessarily better. Not to say getting a new kit isn't a good idea, but RC racing is still 60% driver and 40% car. If your budget is anything like mine, it's much more reasonable to put the time into truly knowing the car you run and getting as much practice as possible to improve the driver.