It`s a stock system therefore the density is standard at `` medium``. By `thinning` hair as you describe, you will not achieve a thinner density as such..all you are doing is shortening certain hairs whilst leaving others as they are... a thinning scissors will not remove the hair as such ..it will merely shorten it as the knot is still tied in. The best way is to use hair-removal cream dabbed on carefully to the knots on the underside of the base before anything like knot-sealer is/has been applied. How-to : http://www.youtube.com/watch?v=rPULkcyVD2Y