After several tries with Einkorn and White Sonora … the best sifting (and there is another thread: Using a 40 mesh sifter) was with the 40 on to parchment paper. I tried the 50 (after the 40) and do not have the patience.
The Einkorn is much softer than the White Sonora and I had no issues using it unsifted. The White Sonora I felt needed to be sifted. Again tried 40 and then 50 and didn’t get much through the 50.
Baking results were fine with both although the first time I used the White Sonora, I added extra flour thinking it was too wet and after sitting, the flour absorbed the moisture and ended up too dry - my error and I should have known better!
Overall, though, I am going to let Breadtopia grind my flour. I am in the minority, at least on this site, but the grinding process, even without sifting … I don’t enjoy it at all. And I think the Vitamix is faster than a mill and contains more of the dust (I’m only going from videos I’ve watched) … still am happier working with the ground flour I get from Breadtopia.
***I did a lot of reading about “milling” with Vitamix so if you enjoy the process and want more info from sources who like milling, google “grinding flour with Vitamix”. Lots of posts and information specific to Vitamix.