BTW, I achieved new state of vapor perfection and production one more time with the M1-D model.
After dremmeling the stem glass screen and making cuts to the stem bowl rim (8 cuts/slits, 1/2mm deep I'll say) I was getting too much airflow and the ABV was light orange/greenish. ABV was either way totally dry and crumble to dust. SS screens are .5" diameter, they tend to dome when you slide them down the stem. I was placing 2 together to avoid high airflow.
Then I tried again some glass screens I bought on my first attempt to create a Cloud alike all glass air path (aka no SS contact between herb and heating element, that gives IMO a different taste than all glass).
So, after fiddling with the glass screen, I finally find this solution that IMO works well to me...
*1.... this is all done while your stem/GonG PV stem is upside down, like being attached to a water tool, ok???,
and this is all done after dremmeling and sanding and cleaning the crap out of the stem... BTW, I always wash my SS screens and ISO them before using them, I mostly buy from LHS and they tend to taste and smell like incense, do yourself a favor and clean them before using them
*2....BTW, no more LHS SS screens, this method clogs SS screens in let's say 1 day for me, let's say 5 to 6 12min sessions a day. From now on I'll order online 1000 SS screens bag, 1 year supply
*3....place first SS screen belly facing down, makes sense, SS screen tend to dome when being slide down
*4... place as small as you can find glass screen in that little belly of the first SS you domed
*5... place a 2nd SS screen on top of that little glass screen, like a SS glass SS screens sandwich,
*6... vape as hard as you can, but be careful, after temperature level 5, things start to get a little bit hot, you better have a good water tool and keep that strong draw, because your ABV will be dark brown now
Easy mods for an easy vaporizer IMO, with very good results, enjoy yourselves