I started rotary processing with the Unicolor/Beseler motor base and drums. I was really please with the results and still use it for processing my 5x7 and 8x10 sheet films
The drums I used were for print processing and not film, but they work fine. So why not give the Ilford drum a try, it might just work for you. The insides are smooth like the BTZ tubes so you never know.
Make sure the emulsion is facing into the tube. I have always used a plain water bath as a presoak.
I now have a Jobo CPE2 Plus that I use for B&W & E6 processing of all film sizes up to 4x5, but I still use the old set up for the larger film sizes.