What's up my fellow GPeeps!! I knew I felt a buzz in the air! 
Perseas. Would matching serial numbers be possible on the Piccolo v4 and the Spheroid v4?
Perseas - I'm curious, and it may be too early to tell, but now that Vapourart doesn't have any atomizers in production that require air flow from the 510 connection have you thought that the GP Paps v4 might come with a flat top cap by default with an optional slotted top cap available separately? I'm not suggesting that you go that way, I'm just wondering.
But @perseas, for this sferoid i hope you would make a new piccolo for best hibrid matching...
The GP Piccolo v4 released this year and I can't find any fault to it yet. And how much better do you want it to be? A spheroid with hybrid connection, a tube and a switch are the only parts of the Piccoloid.
The only matter without a satisfactory solution yet is the logos, they cannot be aligned due to threaded parts. At 16 mm, we have room to put only one O-ring around the base of the Spheroid to join the tube as a push fit , but it won't be stable or leakage free. So, the threading is the correct solution.
And while on that subject, can anyone explain why a piccoloid can have all engravings lined up one time, but then when you tear down the gear to clean and reassemble, the logos misalign? Repeated tear downs will eventually line them up again.
I ask this because that would be one thing to test after the engravings are performed in the new step.