Raymond Peter Thomas wrote:

Cutting to the chase somewhat, are you sure you really want to play your
valued records using an arm which typically required a 'downforce' on the
cartridge/stylus of 3-5 grams ?

Not so.

The RMG 309 has a beautifully calibrated rotatable couterbalance calibrated 0-5
in 1 gram increments. Being infinitely adjustable, select your own tracking
force, normally 1.5 - 2 in my case with a Shure or Stanton.

I don't know how records of that era survived such treatment, it's not like
they had specialized stylus profiles or anything to reduce the psi on the
groove. I believe the Ortofon cartridge of that era was quite revered,

Uhuh. I must somewhere have the one that came with the arm but it was only mono
IIRC. One of the first moving coils that I know of.

a bit like the Decca London. Might pay to post your inquiry to the hifi
fraternity newsgroups, such as aus.hi-fi (a quite good source of info)

Graham