How do i recreate the soft pencil brush from Concepts in Ibispaint?

[plain siren]

I really like using it for some reason, makes it feel like my sketches are faster and alot more clearer than the ones in ibis
But it lags super bad when i use the erase tool so im trying to make a brush similar to it in ibispaint.

Maybe what makes it so good is because it forces me to avoid erasing too much?

Idk

[plain siren]

Did some stuff, very close to the original i might say so myself