I have made several batches, and I am ready to make another.
I have tried several methods: Blender, ISO, bubble bags. Bubble bags are best, by far.
My first batch, I used everything that I didn't keep for smoking: all fan leaves and trim. Needless to say, my first batch, doing just blender, ice water and so much trash, the end product wasn't that great. It was hash though, and it tasted pretty good and worked. These days, I only save fine trim, popcorn bud and sometimes some good bud. This next batch is going to be awesome. I've saved the trim from a couple harvests, lots of popcorn, and even nearly a whole plant cuz I let it go too long and got kind of dry.