What is really required for this type of film is an extreme low contrast compensating developer, not Rodinal. Even if you can get half-reasonable contrast out of CMS-20 using Rodinal at some ridiculous dilution with minimal agitation, you're looking at an abysmal EI and poor tonality. The best I could come up with for this film was a working speed of around EI 3 using TD-3 developer, which produced far better results and uniformity than Adotech. Better, but far from good.