Yes i was not sure about this myself .
However if the drawing is correct in terms of the use of the simultaneous requirements methodology.
Obviously this is a very small portion of the drawing you guys are helping me with .
The reason I kept Datum B + C
I was going to use them Secondary and tertiary Datum
Also the outside profile of this part has a surface of a profile to Datum B .
This one of the main reason i am struggling with this part as i am trying to control these 4 pockets and also use them as a Datum . As there not much else functional on the part .
Thanks
Ross