I am talking about the small I believe they call them torsion springs used in the FX or SideShot style magazines. I have a FX Streamline and FX Verminator that I would like to try 3D printing a magazine for when I get my skills up. My FX Verminator is such a perfect pester with it's short compact size and bottle feed high shot count. It is a shame that they only offer a small 11 shot capacity with a price of $60 per magazine. In high volume pesting situations it would cost way to much to purchase the amount of magazines I need. Any sources for these type springs would be much appreciated. Bill