Tracking error or ??

Experiment.
lower the arm/head shell weight to 1 gr. Then try other weights, and listen to the album. 
   Mine are recommended at 3+grams, nope, I play mine at about 1.75 up to 2 grams.  Sounds great to me.

    I used to use the Ortofon X5-MC- Great cartridge, low output.
one day I was wiping my TT, a piece of the cheesecloth, hooked the stylus, (PING) Cantilever gone, sent to Ortofon, said was my fault,…whatever, they gave me good credit for it, bought a nightclub II, and the Archiv (both Concorde) style.
never looked back.
amazing sound and reliability, …tracking is flawless with these.
recorded well over 300+ LPs’ using these 2 styli. Easy to swap, easy to set up for diff weight.

mess with the weight, til you find what works!

   Enjoy!

@articdeth I think with the Kleos ( and all Lyra’s) the VTF is crucial. i have mine set at the suggested VTF.Thank you, but I will not be experimenting with that.

Dear @daveyf  : ""   although selecting an arm that works better and works on my LP12 is the question. ""

You repeat that around 3 times in your thread, so you are merried with the LP12 till you die.

I don't know why and it's up to you but again I want to tell you  that you have look for a monk that can give you the LP12 divorce and marry with the Rega RP 10 that comes with a first rate tonearm and as I said in one of my posts to you in this thread:  the humble Rega RP10 and tonearm that was compared against the SAT XD-1 TT with SAT tonearm and top rated cartridges and guess what not only made a extremely good job but that 180+K SAT combination did not " kills " the 6K Rega RP10.

You don't need other tonearm the Rega IS AN EXCELLENT TONEARM AND AT LEAST COMPETES AGAINST THE sat ONE.

R.

@rauliruegas Raul, have you heard the Rega RP 10? I ask as I have and while it is a very good table, it is not IMHO in any way better than what I currently have. Plus, I think in some areas, like resolution, the Linn is better. If you are referring to the review by MF, yes he did say that the RP10 was not ’killed’ by the SAT combo, MF has a way of sugar coating his thoughts when it comes to these matters. IME, I would expect the SAT to easily best the RP10, but maybe not in the amount of difference that the SAT cost ( which IMHO is ’comical’). As we both know, there are diminishing returns when you get up into the upper echelon of the high end world. IF I’m getting away from the Linn platform, it would into something like a Basis or maybe a TW...mainly because I like the possibility of multiple arms. (although the Basis models are still restrictive in that regard!).