yes & yes
hash is a process not a recipe I've only done dry seived hash and Isopropyl extracted oil (yuk !)
Seived hash is best done on cured leaf & bud IMHO, I like to make canna butter with the seived residue (leaf & bud matter.
I'm no expert on hermieing but what I hear is it's easy to induce hermeing by stress in plants from previously hermied plants that the seeds came from. It might even not take ANY stress if was going to. Thai weed is notorious for hermeing.