(just type an @ and a pop down list of prior responders shows up, just click on a name)
you have had some great stuff in the past, and I always think of others who might be following a discussion, so I post this and that ........
well, why Rega? low profile cartridge body, no arm height adjustment, no removable headshell, i.e. the most restrictive regarding cartridge choice/change?
from the prior discussion:
"I hadn’t known, and realized along the way that REGA purposely uses cartridge bodies with less than normal height and the arm height is not adjustable, thus the discussion of shims is to shim the arm height up if you change to a more conventional height cartridge like the AT MMs many of us recommend.
audphile1
6,242 posts
These look fine and the price is not bad
https://www.audioadvice.com/products/acoustic-signature-rega-spacer-set-large

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The Ortofon is made specifically to fit the ’low profile’ REGA.
top of your budget, $460. this is Ortofon’s Line Contact, low profile for REGA’s
https://www.audioadvisor.com/or2mrbronze?sku=NEW-OR2MRBRONZE
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AI Quickie Results, beware of errors
The height of a typical stereo cartridge body, measured from the stylus tip to the top of the cartridge, generally falls within a range of 15 mm to 19 mm, with many common models clustering around 17–18 mm. For example, Ortofon 2M series and Nagaoka MP series cartridges are approximately 18 mm tall , while Audio-Technica MM cartridges are typically around 17 mm. Some models, such as the Ortofon MC Rondo, can be as tall as 20.5 mm , and the Denon DL110 measures 17.6 mm. Shure cartridges are notably shorter at about 15 mm , and Rega cartridges are around 14 mm. A common observation is that many cartridges, when measured from the top of the cartridge to the free-hanging stylus tip, register close to 18 mm, though variations exist based on the specific model and manufacturer."

