The ESP Guitar Company

Hi everyone, new guy in the ESP/LTD family Yesterday I bought a white TE-406 'cause it felt just right, there's not much more to say. So, I went for a thicker gauge (actually really thicker: 0.75 on the low E) on the purpose of down-tuning it but the string couldn't fit in the tuner. Do you know the tuners model? On the guitar page it just says "Grover". And what may I change them with?

Thanks for the help, rock on!!