Because some mentioned the very bright (and sometimes annoying) RGB-LED, I dived into the source code and finally came up with this modified hw_config.c
L59: Added delta4 (used for new TIM1->CCR4)
L94: Definition of LED_DIM
L462-472: Divide by LED_DIM
L678-757: Modulo stuff with TIM1->CC4 and LED_DIM…
I think it’s evil code but it works!
Feel free to ignore, improve, fork and pull a request!