Testing was done at Street break RC drift track which is a concrete surface track located in Clearwater, Florida. My SD 2.0 used Yokomo DRC tires for testing.

First run on the track was at 4 which is middle of the chassis adjustment. This was a solid starting point with good grip, and control slide.

Second run on the track was at 6 which is the stiffest chassis adjustment. This had less overall grip, and felt more like the standard chassis. This also gave it more of an over rotation factor, which could be good on some higher grip tate tracks.

Third run was at 0 which is the most flexible possible. With the added flex, I felt like the car pulled out of the corner more on throttle. This helped to keep up with a car in front of me when chasing. This for me on the surface I was testing on worked the best for me. I was much more in control and I was able to place the car wherever I wanted to go.

My car also used magnetic body post. I think this chassis would perform even better with standard body post, allowing the car to flex even more in a consistent manner.
More testing is on the horizon with removing the large Stefiner, and having even more chassis flex. Stay tuned.
In closing, I feel like this chassis performs much better than the stock chassis and the looks of it are outstanding. Great job Rdesigns!
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