IMHO, Tmax400 in Rodinal is just a waste of a very good film in an unsuitable developer.
I also do not understand what makes R09 "easier to handle" than Tmax. Both are very stable concentrates (Tmax is also quite stable as a working solution) and have to be dilued with water. So, where is the difference? Anyway, "ease of use" should not be your major guideline if you want good negatives.
In reality, I guess, most people are only motivated to use a Rodinal-type developer by the (mostly unjustified) cult following in the web.

D-76 is a very good match for Tmax400, and so are Xtol and Tmax.

Georg