I just received mine from Fast Tech (Laser Engraved model). Damn that took a long time.
I have a problem with mine. The 510 connector threads are cut too wide.
Most of my attys screw on but few literally just fall through the threads (including some cartomizers).
The ones that do screw on are extremely loose to start - but tighten once they reach the bottom threads.
I had a couple pop off.
I have an Igo-W (real one) and a clone IGO-L - both fall right through the threads.
If the threads loosen up anymore - nothing will thread onto it.
So that is a big concern of mine.
I just found there's a thread on FastTech about the bad 510 connector (have to read more).
My Korean script and serial #'s are more grey (like the real Chi-You) - I think all the ones I've seen so far are pretty dark.
The etching on the button is also very light in color.
Beyond that everything seems the same as what others have posted.
Out of the box and disassembled
Script and serial #s are light grey color
Front logo seems same
Button etching - light grey
One Hole Nimbus clone barely threads on
Same with the Immortalizer clone
A few others fit, but just barely.
Anyone with the AKA Vapers have the same problem with their 510 threads?