Back to the original theme of the post : i'v noticed some variation in level of finition / polishing these last month of a same part/device (i usually order the parts when just launch from e-smoke guru).
While very recently the spider drip, the penelope dripper, short kit, last v2 base, caps and mouthpieces are at their best (my spider drip is absolutely flawless, as is my Penelope #20) among with the first serie of jGG wich had very well softened and polished threads and inside parts, the intermediate serie before the release of the 'upgrade' of the Ithaka had really 'raw' threads, bad or strictly no polished flats (upgrade housing, ithaka ceramic housing, ithaka upper cap, ithaka feeder, jGG sleeve, 2 ithaka collector ggts base, ...), jGG engraved tube with less level of mirror polishing (and micro scuff).
Since last summer i bought 5 Ithakas, 3 penelope, 5 jGG (1 solid), upgrades, drippers, window, caps and caps, rings and rings

small panel comparing to the Ishtak appetite ...
My upgrade part arrived unpolished unfinished, the threads (both connecting the base and the mouthpiece) while working well to say the truth were really ugly and sharpened, the bottom was grey with marks and a penelope base had flats on the polish area near the serial number....
Not a big deal, it just allow me to feel free to take the time to polish it myself to bring the finish to the level this brilliantly engineered pieces desserve
I always stay in touch with products from other makers (in fact i buy almost everything wich vape), while i consider mmvapors and nosmoker the only ones able to compete (with a distance, svoemesto) when it comes to think globaly of the 'authenticity' and involvment in the concept / device, the best grain mirror polish encountered by my zeiss x10 lupe v' been :
Caravela steel
Nahual
Mmvapors (poldiac steel, previous DID, tns)
GP (paps lux tubes)
GG
Atmomixani
The mirror kayfun i own, dingo mod and other stuff less knowned are far from earning the quality of 'mirror' (circle trace of the tool, concave button, flats, micro scuff, etc...). Feeling of the threads is another story ....
All based from my proper constatation, without any ambition to be a general appreciation, of course, jus a fan - a bit maniac - speaking