No, he don't using embryo culture.
To be honest I have very little experience on this, this is my first year using oriental pollen. My Silk Road was pollinated with pollen Anthony send me from Cam Alpha. I understand from what Brian B. writes that some orientals do well on OTs and some does not. You just have to try with what you have and see if it works. If some have a extra bulb from Buggys Queen series I would like to buy it or trade with some lilies I have. Imagine a spotty OT.
Silk Road x oriental pollen, seeds from NALS.