An old thread but one comment needs to be corrected, because two statements there are completly wrong:
Vicdamone wrote:
The carbon Well Tempered arms were sand filled which made them slightly heavier than the metal arms. There are various arm tower designs which in the end do the job.
This is not the case:
The Carbon Well Tempered Reference tonearm was NOT filled with sand!
It was a lighter design!
I know this very well because I had the 9" Reference arm on my WT Reference but I received a unique 10" carbon armtube for my WT Signature to replace its stainless-steel armtube! This custommade 10" armtube again had no sand inside the tube!
Sand was used in the early WT Classic tonarm as well as in the Signature tonearm. (as well as in the later tonearms with golfball-silicone bearings)
After I had the armtube of the Signature arm replaced with the new non-sandfilled carbon armtube it sounded better!
Regarding the newer golfball versions:
I never liked them, they weren't that sophisticated for a precise setup.
I think that the Reference and Signature where the peak of WT tonearm design
BUT:
having used both for years I had to realize that despite the very nice sound:
!!! My Well Tempered tonearms bent cantilevers of cartridges !!!
I started from the beginning to use thinner silicon-fluid for damping which Mr. Brakemeier, designer of the amazing Apolypt turntable recommended to use
(he also recommended ZYC cartridges which I agree, they were a perfect match). So the lets call it bearing friction was for sure lower than with the thicker orig. silicone fluid.
But all my cartridges after a period of max. 500 hours developed "bent cantilevers":
Seen from the front this bent was towards the right side, i.e. outer groove of the record. This happened because the resistance/friction of the silicone was still too high.
I killed a Koetus Urushi Tsugaru, a Urushi Wazima as well as two expensive ZYX cartridges.
Too bad.
I would never again use a WT tonearm, too expensive considering the damage done to those cartridges.