I have very much enjoyed my Hydrology 9. The only things I might add or adjust. Perhaps if there was some way to charge it faster, that would be my only adjustment. If there was a tool made specifically more for packing, that would be the perfect addition. Also if there was potential a bottom piece made for concentrate. I also realized you don’t want to pack as much as you possibly can, other wise you won’t get hardly any vape. Just a decent pack is the most effective. Thank you for this awesome product otherwise. Now that I’ve used it a handful of times, I’m understanding how to overcome any beginner Hydrology 9 issues I was having.