My best session last night was on 13.4 Other than the comments about how professional the stems don't look, I take back everything I said bout the stems. I really got into a nice groove the last coule of days playing with the screens and, at least on the short term, I really like them. I push the screen down when sucking up the herb and then push it back up to tighten the load. You can get it all the way to a PD type draw like this for a really thick hit. Then I push the screen down a little, stir, and push it back up for more. I still don't see the need to adjust the screen for temp's sake, but for being able to stir without dumping and for being able to pack it tighter or looser it is great!