I've just recently changed strings on mine, from TI Jazz flats to GHS Precisions.
Honestly, I'm not entirely sure why, I'll give it a couple more weeks but I think the TI's sounded better to me.
Anyway, since the new strings went on, I cannot keep my 'Kat in tune!
It stays close, but after a song or two, it's out again...E and A strings the culprits.
I've also had a devil of a job getting my intonation on the E right...I'm pretty sure I must've moved my bridge whilst cleaning it when the strings were off.
Thinking I may invest in new tuners, the Hipshot Ultralites most likely.
Possibly also get the Hipshot Supertone bridge too.