Hello,
I can't comment specifically on either the SL-1300G or the Art Cartridge. I do know two things that may be helpful, though. I do own the Technics SL-1400G and a Transfiguration Phoenix S cartridge. The Transfiguration cartridge is remarkable in that it's one of the few cartridges I've seen Michael Fremer rave about (Along with the AT-ART1000X). Please find and read the review on the Transfiguration. Now on to your turntable, coincidentally Michael RAVES about it along with mine. I sold my highly reviewed Pro-Ject RPM 10 Carbon. This Technics with the Transfiguration is literally SHOCKING. I've never heard control of LPs at this level. If this is a turntable then both my Pro-Ject and Previous VPI Classic were toys. My Ortofon Cadenza Bronze falls so far short of the Transfiguration with this turntable. KNowing these things I've set my sights on taking Michael's advise and one day in the near future I'll put the AT-ART1000X on a "CARD" as he suggested. It's on my radar. I hope this helps encourage you to trust your turntable (and Michael).