In terms of being the Intermediary Connection for the Cartridge to be attached tje the Tonearms Wand.
The SME Bayonet Connection is typically loose, not to the feel of the hand, but for the rigidity the Cartridge requires.
Investigating how to reduce play in the Connection will give a Cartridge a very noticeable uplift in performance when addressed.
The learning should not prevent the Cartridge being put to use immediately, other additional tweaks can be a follow up.
The Best One I known for this, which includes a interference fit part, is not as convenient to use as the original design when put in place, but the effect on the end sound is night / day when heard.