The finish on the black's didn't pass quality control.
Another batch is in manufacturing process atm I believe.
I'll vouch for the quality of the nickle ones - my 2 dozen are perfect !!
A "stealth" version is also in the making - same fitting but with no knurling which could be interesting.
The grip is so good you can use a tube offcut to tighten / loosen the fittings.
He's also going to to some holding pressure tests soon from what I gather.
The 2 lt bottle hanging off the tube (in the fitting) didn't convince everybody