my understanding of double clutching is this:depress clutch, put into neutral, and release clutch. rev engine, depress clutch, and put into lower gear. alternately, you could just put in the clutch once and rev it up WHILE you're taking it out of the higher gear and putting it into a lower gear. also, to the best of my knowledge, you don't double clutch ushift, yuo powerr shift, that is, you don't completely let up of the gas while shifting, you rev it while the clutch is in. also, for countours, i've heard anywhere from 2k-3k is good for launching rpm's. let the flames begin