I have talked to Ralph on this subject a lot. I have had M60’s upgraded, MA-1’s upgraded and now MP-3. Ralph has never said to me that the Caddocks aren’t worth it. If that was the case I doubt he’d sell them. What he has said.... Is that there are better upgrades to do first. Bigger bang for the buck. The caddocks are just that. A finishing touch. And believe me they are worth it. I have them in my Amps. MA-1’s along with all the other upgrades. And now the MP-3. Almost every Upgrade I’ve had done, I did in steps. Months to a year between each. That’s the luxury of living 20 minutes from his shop. No shipping. So yes I am quest aware of what improvements have been made sonically with each upgrade. Nothing else has changed in my system. And my system is for listening to and not looks. I average 2 hours a night M-F. 10-12 hours Saturday and Sundays with the covid stuff. But it’s really for everyone to make a choice. Is it worth it or not. My last upgrade will be the Caddocks added to my Volume control. Now that gets pricey. I’ll report back when I eventually get that done. Probably in the spring.