well the way i always make it i use 2 coffee filters and worked fine....towards the end i strain whatever is left(dont know if is a good thing but i like to get all the trichs left back)out of 6g you should get a nice chunk...i also learned that its better to freeze for a few hours before you make ur hash....also try grinding before....to be honest with you i've never made iso with real bud only stems and a couple trimmings...i wish i had 6 g of bud to make iso...