Hey everyone, second noob thread. I don't think many of these questions have been asked before (I've searched around quite a bit) but if they have, don't flame meh too bad

. Anyway, so after looking around at reviews, general impressions etc. I have noticed that G&G seems to have picked up their game recently. However, I still have a few questions regarding their quality.
1. What's up with the metal body content? I mean some sites say Magnesium, some sites say "Magnese" some people say it's plastic and metal mixed together (?!). Any Chem experts want to share the differences? As far as I've heard, magnesium oxidixes and magnese flakes away (Are they the same thing? Why would G&G choose to use those materials for an AEG body then?)
2. Biggest question. Internals. Reading reviews from 2006 to 2008 it seems that G&G has stepped up it's QC. Back in 2006 reviews, I was reading that people had their internals stripped after a few games. It seemed that you had a 50-50 chance of getting good internals. Now, (Not sure on this) it seems that G&G has reinforced its gearboxes? I've read that in recent months their gearboxes conatin steel gears, are pre-shimmed (Although further shimming is probably required

), have steel spring guide, and metal bearing bushings. I've also seen their guns with V2 gearboxes advertised as the TM design so it would make sense that their internal components be the same quality. A side note, some of thier AEG's advertise shooting at high 200's or low 300's, I assume that G&G gearboxes should be able to handle this (It's not a blistering 400+ FPS

), especially if they are TM clones. With a few small upgrades (Spring) these AEG's could probabaly shoot 350+ if they are as reinforced as G&G advertises. Any confirmation on any of this stuff?
3. Hop-up. I've read reviews saying that the stock hop-up is horrible. Mind you these reviews were also from a year or two ago so I'm not sure whether G&G has improved this aspect aswell. Even so, couldn't you just replace mentioned hop-up with a better one.
4. Advertising. Some people say G&G spends too much time advertising and not enough time QC-ing (Not even a word but oh well.

). I assume this would be the reason for the early gearboxes failures?
Thanks.