There is a famous quote attributed to the circus man PT Barnum...I'm quite perplexed by the rave reviews of the CPS. I found it be highly variable in seating depth. Given it indexes off the rim, i shouldn't have been surprised. I think its incredibly overpriced and poorly designed.
I bought a Derraco for that exact reason.My arthritic hands would truly love a CPS but, I don't think it will ever happen.
My $40 K&M seater works just great. If my arthritis was that bad I would look into the RCBS seater. Reasonable price and does the job.
Paul