Dang, someone remembered!

Thanks!

Not the nicest of days, down with the flu and thus more or less in self isolation (not so much because of the 'rona, I just absolutely did not feel like organising any form of social gathering),

Messed about a bit more with the Wankel, and to my amazement, I saw another 100 RPM. Not stable but also not as an outlier "freak-peak", it was fairly repeatable.
So peak RPM today was 13550.
Given that 2 days ago it still topped out at 12950, that is an increment of near 14% from 0,46 hp to 0,53 hp (acc Pé Reivers, Lets not focus on the absolute values, whatever they are, the increase is about 14~15%).
I get the feeling, this engine was not yet even properly broken in, OR there is an awful lot of old castor crud washing out.