Here are my BF settings.. these are only MY settings and may not be for everyone.. then again I got alot of requests for this so here it is... A few notes.. I initially had alot of problems with 4.0 and after updating to 4.05 and changing these settings I think it flys great! I run 2600-2700kv 2306 or sometimes 2207 motors on a 4s squish x frame so these settings are tailored around my particular setup but WILL WORK on almost any 5 inch setup.. I have tested it with almost every gyro (ICM MPU Bosche) and it works great, on icm gyro's i bring dshot down to 600 and 8k/4k pidloop and it runs the smoothest on the radix fc with Bosche gyro but anything will really..
I increase my filtering not only to counter motor oscillation from the motors but also because i fly alot of different environments with wind and moisture and even bent or chipped props sometimes so having the extra filtering and latency actually helps with flying windy areas!
if you think I got something wrong or have any tips for me please let me know in the comments, Happy Flying!