Removable headshells 101

Timeltel has raised the subject of the rubber 'O' rings normally supplied between the headshell and the locking-collar of the tonearm.
Fidelity Research abhors them and Yamamoto headshells also are supplied without.
I have largely eschewed them with all my removable headshells but would be interested in the benefits that those who use them, claim to hear?

I was around in the old days and always took the washers out. There is nothing wrong with detachable arms except lack of rigidity, which is arguably less important for MMs, which are inevitably themselves less rigid due to their replaceable stylus. I recently bought a Jelco 750 to use on my back up table, I hadn't had a detachable arm since the early 80s. When looking at older headshells look at ones made from cast magnesium [ like the Lustre] or similar rigid material rather than flimsy designs full of holes that were designed for minimum mass rather than rigidity. The ADC cast aluminum ones were quite good. I got sticker shock when I looked at some of the new ones and I have enough old ones to use anyway.

Like Stanwal I was also around in the (good) old days and
also took the washers out. But to be honest I forget the reason why... I also agree with my old mate reg. Jelco 750
wich has different names as well different price in different countrys (Sumiko in the UK and ? in Germany).
To my knowledge the best headshell for the price. If the money is not an issue you may look for those Orsonic or
(Clearaudio) Stability headshells.

Regards,