Yup, that was me
Anyways, I'd be glad to see what you're doing- I keep odds-and-ends in the FA-MAS, as well, inside the pistol-grip I keep a small baggie of .25s. The hatch doesn't open, too, it's fairly tight and the BBs are really light, as well- you can open the hatch, and they won't fall out, because they're kept together by the side.
Yeah, that's true- there's a multitude of FA-MAS upgrades, you just need to know what to do (I don't know very well, really, only last week I was saved from making my gears self-destruct). The night-sights idea is amazing, to say the least- I'd like to see how this turns out. It'd be hard to do, though.