I forgot to mention that the drive spindles rotate very slow if adjusted for RA-4
If you are going to process color with RA-4, it is better to use the chemicals for Roller Transport processor (Kodak has the designation RT) since they will last longer than the chemicals made for minilabs (i.e. Kodak Prime SP).
Anyway, unless you process a lot of prints, it will be difficult to exhaust the chemicals before they turn bad from oxidation (11 lts. of developer is a lot)