Conclusion

The GroundRod Retarget PID was tuned for quick retargetting in case of high fluctuation of difficulty, but with the necessity to have at least ca one hundred blocks at each hashrate levels. Here the pattern of mining is more like mine 25 easy, let others mine one hard, mine 25 easy, let others mine one hard. Consequently I am in the process of tuning the parameters of the PID to have less aggressive variation of difficulty for then the ratio between easy and hard difficulty block will be less than one hundred as it is actually, limiting the impact of higher and lower difficulty and hopefully smoothing the block distribution. The community will be updated when I will be satisfied with the new parameters. CS