Need fine setting for autotune

[LeoI5]

Is your feature request related to a problem? Please describe.
Autotune finished with my house heat system without result.
I've found that oscillation starts at Kp=250. And period of oscillation is above 2 hrs.

Describe the solution you'd like
There is required two parameters for autotune process:
Kp (default = 100) to set any value
Max wait period for reach the period of oscillation

Describe alternatives you've considered
Manual set Kp above 100, wait period of oscillation and then calculate Kp Ki Kd

Additional context
Many thanks for HASmartThermostat