You can get good results out of the R3, but NOT with D76/ID11.
Like the SFX also the R3 is a T.S.F., sensible till approx. 710-730nm.
It has a 3 layer cubic emulsion of iso 50, 150 and iso 500. You need a depth developer for a suitable development: CG-512 (at 24 degrees C.) aka Rollei Low Speed (E.I. 50-200) or the AM74 (Amaloco) 1+7, aka Rollei High Speed (E.I. 200 till approx. 1000 which is a +2 push already). If you are going to a high dilution with AM74 (1+19), it is working as surface developer and it's not working anymore in the way it should with this special R3 film.
An E.I. over iso 1600 I can not recommend. Same why I do not understand the D76 recommendation of Rollei/Maco, worthless!
Best regards,
Robert