Meant to post this here:
I hear ya, LITO. Mags are the very next thing I will work on after I get a rear end printed. I like your waffle style idea. Kyle and I have been discussing a worthy replacement for the chain as well, going so far as to let shapeways sinter the links together. They would be quite strong, and even allow for the cog pull to be a more easily replaced material, such as nylon, polycarbonate or ABS. I'll start like I am doing with the back end though, a simple shell replacement for stock internal mechanisms, then we'll work out from there.
I sent you a PM regarding forward loaders, btw!