Rabco SL-8E Tone Arm

But as I have pointed out other posts you can minimise cantliver flex in tangential air bearing arms by employing electromagnetic damping. I used a Shure V15Vmr on an ET2 for about 6 years and the cantilever is still as straight as a die. A small ( nickel size for you guys ) ring magnet under the beam accomplishes this.
Servos are like Digital, they are only a little bit out all of the time. Sitting in the listening chair, with a Goldmund Studio, watching the servo lights go on and off constantly with a $10k cartridge on the end is not my idea of relaxing to music.

Atmasphere, yes I get that and I dont think there was any difference in deflection on eccentric records between a conventional arm and the ET ( with the dampening applied). The amount of deflection will vary depending on the horizontal compliance of each cartridge. The Dynavector arms use the same electromagnetic horizontal damping to counter the high horizontal mass in their biaxial design.
Possibly a case here for low compliance cartridges if we assume many records are off centre.

Hi Lewm,
I'm guessing on the Dynavector, but I would assume that although the Dynavector has a high mass in the vertical plain, because it is a balanced beam, ie the counterweight at the back balances the arm to zero, then they have added electromagnetic damping to minimise excessive overshoot of movement on eccentric records. One thing I know, their argument for high horizontal mass/biaxial design is that the inertia of the heavy beam provides better bass as you have alluded, so I guess the damping may be an extension of this thinking.
Certainly on the ET I have to turn the volume down when the e/m damping is applied, which is quite astonishing to think that excessive lateral movement can affect the audible or dynamic output to that degree.