not 100% on g60's but as you say they are basicly a digifant. you adjust the mixture/co2 by an allen key (5mm i think) on top of the air box by the afm. there may be a little blue anti-tamper cap in the top which you'll have to break off. then turn the allen key anti clockwise to make it leaner, clockwise to make it richer. you only need small adjustments though, helps if you have a co2 tester!