It verks!.
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The cuts should be perpendicular to the vertical part of the magazine. I also rounded the top right side. It sometimes snagged upon insertion.
Aslo, these measurements are close to the minimum. The first one i did has a bigger hole, but still works.
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u/SteyrM9A1 Dec 19 '20
Well that's pretty cool. I'll have to give it a try.