@malbor If you are upgrading the LP12, the place to do it is from the inside out...which is the Linn Protocol. Therefore, the bearing would be the first place to put money. Having said that, your question is still valid in your OP, as the tonearm cable is in fact not that great with an Ittok, so a little money spent there can give you an upswing. The Lingo cable is not in play here, as it is just a low powered power cable and you will not gain anything there. If changing out the tonearm cable disrupts another Linn upgrade due to budget, like the Karousel or power supply, sub chassis etc., then leave that off as well.
Question to @mijostyn How come you have to put your uniformed 2 cents into every LP12 thread...you don’t see folks do the same for your beloved SOTA table threads ( are there even any??).