O1
We obtained an O1 for an applicant who achieved a Master in Bonsai technique. He had apprenticed under one of the premier experts in Japan. We offered letters from field experts praising the applicant's work and noting his extraordinary artistic abilities. We also provided documentation of the applicant's participation as a trade show "featured artist" which is an honor only bestowed on the very best in the field.
Thanks to Leila for doing a wonderful follow upon RFE for the EAD. I got my EAD approved very soon after an RFE was issued.