I had & still have a couple different Cats and they just don't fit my pistol. I much prefer a side or hip quiver and a pack of whatever size I need for the situation.
To me, a Cat just feel stiff & unnatural on my back, and that back handed, blind broadhead draw past my leg made me nervous as a long tailed cat in a room full of rocking chairs. I just never got used to it...
The quiver I like best is a Chuck Adams Arrow Holster I bought a good 22 or more years back.
It's similar to a Selway Hip Quiver, but can be
changed from LH to RH quickly, holds up to 10 arrows, and can be converted to a side quiver by simply attaching a shoulder strap between the belt loop extension and the leather tab on the bottom which has a hole so as to hang it for storage or on stand.
I haven't seen one for sale anywhere for a good 10 or 12 years if not more. Wished I had bought two or three at the time. They were made of heavy saddle leather and there's no rerason they won't last for generations with a little care.
Maybe someday I'll see if I can get Thunderhorn or Selway to cover the hood with leather, it's bare black plastic, and the only part of the design I don't like...
I also like the GFA Side Quiver, but the arrow grippers leave a lot to be desired. Seems the small is generally too small and the large too large for the shafts I use...