Thank you Sammy
Also worth mentioning here is that this is a totally different concept at making a RTA. It is unique, moreso during September-October 2014. There were a lot of design challenges, lots of precision sub-parts to play with, lots of factors to consider ~ both in terms of construction and VTF vs. usability.
Which is why MB reached out to many vapers before plunging into full-scale production. And the reason it took soooooo long! It is pretty difficult to comprehend fully the erstwhile on-goings now by everyone out there ~ but I'm sure you can appreciate what / how it was.
But the goal in mind was always to have a [near perfect] atty. Which the GEM is

Yes, it'd not be all-in-all hunky dory, nothing can be, but at least it is "near" that.
A case in point is what
@turbocad6 is facing: vaping with near 100% VG. Yes, we had tested it with all viscosity of juices. Under different type of coiling, wicking and vaping styles. And we knew ~ not all models could be satisfied ~ but the most effective one was produced.
There's one deck that I received, which is perfect for 100%VG. Fit for
@turbocad6 's style ~ but not so for higher PG. It will leak with 80:20 PG:VG. But I guess, it could be offered as a standalone, optional, purchase with a disclaimer.