Manufacturer has conducted multiple simulations, and from official website, message shown as below:
"Integrating various trial-proven features, our flex controller system strengthens chassis pliability. Rigid chassis frames can safely hold the engine in an accurate position and serve as a great prevention against the many common issues caused by frame movements. Now you can enjoy the thrills of racing without worrying about thread damages in gear box, contact fracture, pressing crack and more. "

For more useful information, you may go to official site
Source: http://www.evo-workshop.com