There is the last step!

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Yes, this is the next step !
I just made the average mean time for finding a block for almost 24h and this is a huge success :
176s for a target of 175s. Just after the HF where hashrate has moved a lot : it's very nice.
this algorithm rocks ! Thanks to Zawy for his research.
summary is here :
http://ird.cash/hard-fork-success