Right, so I have a 3d printer coming in January, not the most powerful of units but definately usable for this project. I've started sourcing other materials like springs or looking into the idea of printing mixed materials such as ninjaflex as a way of making a bb pusher for the magazines. Currently the files are open to use by anyone in google sketchup format but if I'm going to progress this project eventually, I will be moving all cad files over to solidworks which I am trained on. Hopefully in the new year this project can kick off. I will be focusing on designing m4 and p90 3d printable magazines for now.