I found this thread:
http://www.milsurps.com/showthread.php?t=36343
Which states what a Sten mag needs to feed right but I'm wondering if anyone has come up with a tool or solution for correcting sten feed lips to get the right angle? I have but about a half dozen that don't feed due to angle issues.
Years ago an outfit was selling surplus repair tools, the body would be fitted over one portion and another would be presumably hammered down on the feed lips but since then I've never seen them for sale nor am I aware of a repro repair kit.
Also I have Laider's book and yes it is awesome in every way!
I've got a DLO tube gun and a few other MGs but the Sten was my first and fave. I've got an integral silencer for it as well.