Toleracing of center distance with internal gear

[cherish]

Hi all,
first to say sorry if the question is repeated second time
I've order a couple of internal gears from Rollix as picture below:
[PLAIN]http://img155.imageshack.us/img155/5996/centerdistance2.jpg
The calculation from them for internal gears with center distance C=331.494 (mm)
Backslash at center distance maxi: 0.98 (mm)
Backslash at center distance mini: 0.53 (mm)
module of bearing & pinion: m=10
number of teeth: bearing=79, pinion=13
pitch dia: bearing= 790, pinion=130
...
The trouble now I'm facing is chosing tolerancing grade of center distance on bores to fit with shaft of pinion & bearing, more illustration on picture below:
[PLAIN]http://img293.imageshack.us/img293/3594/74496622.jpg
Does anyone know which of standard can be used to look up or formula to calculate the tolerancing grade of center distance in this case pls give me a help
Thanks a lot for your reading this asking

 

[PaulS1950]

The pitch diameters should be tangential.
Use that diameter to lay out your centers for the bearings and shafts.