Ouch yeah that's bad. I would put most of those down to drying too fast I think.As Sas said, you can't tell from the outside what's going to be on the inside. For instance, take this Manno block from 2012, decent tight grain on the outside with NO pitting visible. After finding the crack while still on the lathe I decided to do some exploratory investigation to see how bad it really was.
View attachment 42122View attachment 42123View attachment 42124View attachment 42125