So a bit of a paradigm shift in the approach, but it does make a lot of sense. I can see that even with a single green bean there will be some variation between the beans (density and size) so effectively you the pre roast blend just incorporates a larger variance. But as you have mentioned you get a better mingling of the flavours and mixing of the beans this way so it appears you actually end up with a more uniform consistency.
So a bit of a paradigm shift in the approach, but it does make a lot of sense. I can see that even with a single green bean there will be some variation between the beans (density and size) so effectively you the pre roast blend just incorporates a larger variance. But as you have mentioned you get a better mingling of the flavours and mixing of the beans this way so it appears you actually end up with a more uniform consistency.
Thank you for the detailed clarification.