I recently received a batch of Ewbanks receivers directly from Joeken. The S/Ns are in the 002500 range. The S/Ns of the receivers that I reviewed previously in this thread were in the 001750 range. I have examined 2 of the newer batch and here is what I see.
THINGS THAT HAVE GOTTEN WORSE
THINGS THAT HAVENT CHANGED
The trigger pin hole is still slightly stretched at the bottom. You may want to reshape it with a small hammer.
The right lower rail must be trimmed to allow mag insertion.
The ejector hook must be trimmed to allow bolt passage.
They still have the drain holes (jig locating holes) in the bottom.
I have had no problem with the position of the selector hole.
I have seen no significant warping.
THINGS THAT HAVE IMPROVED
They are uniformly blasted and look good. They come oiled and wrapped in plastic. There was no residual grit from the blasting.
There are no significant burrs on the underside of the upper rails. The edges of the rails are sharp though. You can avoid unnecessary bloodshed if you touch them with a file first thing.
The distance between the upper rails has been increased by about .030" by reducing the width of the upper rails by .015. The previous receivers were tight and sometimes required trimming to allow bolt carrier movement. This makes the distance between the upper rails about .010 wider (.997" at the center support) than a SAIGA (.987") that I use as a reference standard. I think this is a good dimensional choice for a receiver intended to universally fit various kits.