Hi, Martin!
The Rondinax is just superb, I use it for Colour C41 now too! It uses only 200ml of each chemical solution and I'll get 5 or 6 rolls easily. ... If I'm correct, the Jobos and Pattersons use much more solution even for only one spiral.
The smallest Jobo reel (System 1500) needs 140ml for rotational and 250ml for inverted processing.