andyturk
Established
If you got your lens awhile ago..maybe a year or so..the QC was better back then..
Sorry to hear that "your" lens failed testing. My guess is that QC is the same now as it was at the beginning, but that the way the factory dealt with bad units was to swap parts with another in the hopes of creating a good one.
Unfortunately, most of the good parts have already been shipped, so it's increasingly difficult to find replacement parts. They may have re-tooled the factory at this point, so it's not practical to build more of the first lens designs.
I wasn't early on the list, but I did get a working lens and I'm very happy with it. If I were in your shoes now, I'd ask for a refund.