the adjustments can be made step-less. The grinder at Sigma is not sold cause of missing CE. they wont sell you any but make you wait.
Timemore has time to make the CE before lauching on kickstarter.
My grinder has the hybrid ghost burrs- they are made for brew, developed for more than 1 year. It has the ek43 pre 2015 pre-breakers with multi raws of teeth like ghost burrs but denser so it can grind finer.
The grind is really really uniform, I can grind much finer than ssp 64mp or 98mm. I brew from 5 to 7 on dial on min rpm speed. (12-20g dose). So out of the question is cant grind fine enough for brew.
For espresso as I said I would not bother with this grinder, or the 64mm small motor one. It’s the same as putting ssp burrs to make espresso in an Ode, shit experience for espresso.
The catch cup is too small and narrow and has a lot of play into a 58mm basket, even if you use a dosing ring it still bad, and the grinds wont be distributed nice in the basket so you need a lot of shake/wdt.
There is no space for a portafilter holder and a dosing ring under the chute. And if you run it at low rpm it might clogg and not evacuate the espresso grind, then you have to adjust manually each dose to high rpm, or blow from above (and it’s impossible to blow cause of the top construction).
Dont waste your money if you are into espresso, there are better choices now for that.