Made three springs until I figured that ONE single spring wouldn't be as strong as I would like. SO made two 0.032" wire dia. 4 coil springs that work in parallel on the mag cover pin.

No mods to the rifle! Dry runs OK! Must have had the rifle torn down twenty time today, though.

I think the takedown pins would be easily lost in the field as sometimes they will just fly out whilst pulling on them with a cartridge rim.