With Rodinal you'll get a fair amount of grain with TMY2 and really won't see the advantages of the film - its low grain in most developers. If you want the convenience and longevity of Rodinal, I would suggest HC110. An all around compromise - not the finest grain, not the sharpest, but much like D-76, pretty good at everything. With TMY2 I use dilution H, which is 1/2 strength dilution B (equal to 1:63), for 11 minutes at 68 degrees.