What ever is not on top
A bottom like you like to be
Well, if he means bottom buds, I get it. But fans and leaves are a big bubble mistake in my book. Dont see throwing in a ton of material that you are filtering out, right? Why, just for a few more lesser quality crystals? Whether bubble or sift, I start with high quality (buds and best sugar leaf) to get clear.
On the other hand, when I make dark Afghani style hash, I do start with bubble. I use a small washing machine and bubble bags. I set up 2 five gallon buckets each with a set of bags in them. First run, 6 minutes. Then Ice and cold water as needed and run 12 minutes for the second bucket. Keep them separate.
I mix just enough of the 12 minute stuff ( which contains more non crystal material ) with the bulk of the six minute stuff, until it kneads into the proper consistency. Not too stickey, not to dry, or it gets crumbly and waxy.
Let those long thin ropes you rolled it into dry on a saucer, plate whatever that you can get it off of. When dry enough to knead like dough do so until throughly mixed. I put it in an empty small jar rosin came in from dispensary, let it cure like pot in a mason jar, until dry enough not to mold.
In this case the extra non crystal material may be good to have. But if you want top grade clear bubble....
Bubba