I had an fr tank when I started out developing film - at the age of 8. Brings back memories. The reels are hard to load - the easiest way is from the center out. The tank has a sharp point on the center spindle for attaching the end of the film, a far cry from a Hewes reel.
The tank is a twiddler: you turn the rod back and forth rapidly and randomly to agitate, with the usual 5 seconds every 30 seconds routine.
I have a Patterson clone that can work the same way but it also has a cap and seal for inversion processing. The fr tank doesn't have this feature.
I have heard the plastic fr used for the white translucent reels has become brittle with age. The tank is probably 50-60++ years old.