Just today... a friend... ahem... milled an e.max crown that was thinner than recommended. It fractured when trimming the connector. So yeah, lesson learned.
Correct me if I'm but I think Ivo. asks for 1mm. That being said if I was restricted to no less than 1mm. my I would be able to mill about one out of ten. I didn't know if Ivo. was just playing safe with the 1mm. guideline or if its gospel .If milled thicker than actual crown clearance allows are you then adj. after crystallization ? .