Cartridge break in

If your MC cartridge is used and you've just had it re-tipped would it require break-in again?

That would depend on whether the rebuilder replaced the
compliance(the material in which the cantilever is mounted),
or not.

Thanks for the feedback.
I'm pissed with myself because the Aries/Zephyr combo was "dialed in." I was really pleased with the sound: violins had a woody mellowness without a trace of harshness; piano reproduction inched closer to how a piano sounds.
But I wasn't satisfied; more is better; a $3K cartridge must be better than a $1K cartridge.
Oh la…
In fairness to the Kleos, it is better Hi-Fi. It seems clearer and more defined but the result, for me, is a better look into how the recordings were made and not into the enjoyment of music.
I fell like the traitorous Cypher in the Matrix. I don't care if my system is not accurate; I want to be fooled by it.

Unfortunately going up the hifi ladder can be difficult as one upgrade will bring out the next weakness in your system.

The Lyra Kleos is not a bright cartridge, it is very smooth and transparent. Perhaps a little hifi sounding compared to a dynavector and perhaps the SS.
Your musical surroundings phono now has to use an additional gain stage for the mc signal. The ms phono is now your weakness as it can sound mechanical and lean.

You replace the ms phono with something better and the Kleos will start singing.

Tuff decision, as IMO if you want to get the most out of the Kleos you need a better phono stage.

I'm unfamiliar with the Musical Surroundings SuperNova, but in principle I concur with Downunder. An inadequate phono stage can distort the richly detailed but very low level signals produced by really good LOMCs.

There's reasonable debate over the "best" order for upgrading turntable vs. tonearm vs. phono stage. IME, upgrading any of these yields positive results.

OTOH, there's almost no debate (among those with experience) that ALL THREE must be up to snuff before undertaking a major cartridge upgrade.

Disproportionate cartridge upgrades are often disappointing, either because a high end cartridge reveals weaknesses in its support system (TT and arm) or because the phono stage can't cope with the depth of detail.

From my own components... my $8K LOMC sings like a goddess on my main rig and phono stage. She does all the audiophile things but in a coordinated way that makes ravishing, lifelike music. However, she can sound miserable on an entry level rig or feeding a low quality phono. If I'd bought this cartridge before having a suitable TT, arm and phono I might not have been happy.

OTOH, I've tried several inexpensive MMs in my main system and most play way above themselves. A $275 MM can fool people into thinking that it's a $1-2K cartridge.

TT, tonearm and phono stage first. Cartridge upgrades should wait.