Tbh I hadn't read the whole link page as I'm on my titchy iPod, but the mag is a copy of laylax brand mags, & they always needed a donor mag as standard.
the other issue with those mags, even if your site allows their use, is that once they're half empty they sound like amplified maracas when you run, very loud, the only way to mute them is to open them up & line all interior surfaces with some kinda insulating material, thin foam etc.