LMSC
Yes the medium drip grind is finer than 9% 400 Kruve, 94 on a Niche (but not fine in terms of drip overall), the Niche is set at 94, my Feldgrind is set to 12% 400 Kruve, (or 3% more of the ground mass over 400 Kruve). I don’t adjust grind settings on a grinder unless I have a good reason. You can brew with any of the brewers with either grind, by adjusting the pour rate (faster pour rate/less pulses for finer grind).
If you pour through the centre late in the brew you will get more agitation and likely more silt in the cup. I just use the centre to get the dose well wetted, then as many pours as possible in the outer ring.
What I was trying to get accross is that, compared to any of my other recommended brew regimes (which are not experiments), the Drip Assist brews are still experimental and NOT rigorously tested.
What works works, what doesn’t, doesn’t…I don’t see how someone can influence that if they follow the instructions, it’s just what happens when water is affected by gravity. If you need to pour at a different rate it is because you have a different brew weight, or grind setting (and there’s a fair range of grind settings that can produce a good cup).