FYI guys,
When I mill the releases, the part of the release that locks the mag in is within 2 thousands of the original width of the plastic one. I would bet that my releases have more uniformity in tolerance all around then the plastic ones. Especially where it counts. Note that Plastic has much better natural lubrication properties then metal does ( Cold rolled steel has zero) so the plastic releases will be more forgiving as far as dropping mags goes. Plastic tends to slip while metal tends to bite. This is why it was NECESSARY to modify MNBUD's follower. That and the fact that the follower should have been given some relief from day one by the manufacture. This is of course IMO. ;D Also the edges will stay sharp on the metal release indefinitely except where the magazine rests on the top of the metal release. There will be some natural honing that takes place during normal cycling of replacing magazines, which is why it's important to have enough material so this doesn't become an issue.
I had a guy that purchased a release from me for a Keltec P3AT. He was using the bersa extension and totally destroyed the release. Apparently he had rather LARGE hands was pushing the release in while he was firing. That along with the downward pressure applied by the bersa extension was enough to sufficiently round the edge of the release where it makes contact with the magazine. He tried to send it back to me by my request but it got lost in the mail and I was never able to see it. The envelope went through the sorter at the post office and it ripped the release right out of the envelope. This is why I use the manila envelopes now since they do NOT go through the sorter.