I've put my M40A1 and M11A1 on the sidelines for the moment. I truly miss my old AEG M16 DMR, the range and versatility was unbelievable. So I've got the money pooled together to purchase a G&G M14, now before I do so I need to be reassured.

I've never upgraded or done much of anything with an AEG. I've always sent mine out to be worked on. Now I've decided to learn about the workings of an AEG, and save money by doing the work myself.
1. G&G is it's own design, cloned by Classic Army. Not compatible with Marui M14 parts. Is this correct?
2. G&G is pre-upgraded, the tappet plate and the air nozzle are the only fault points. Is this correct?
3. G&G comes with a 6.04mm barrel. Is this correct?
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Alright... So once I have the gun in my hands, I should have no problem setting the gun up for deans connectors with a lipoly? I can just put deans on a 11.1 lipo and on the gun and then run it like that?
I'm hoping that the internals are pre-upgraded (They better be because I don't know where to get more parts because I've heard G&G doesn't work with standard V7 parts). Assuming the internals are upgraded, then I'm only going to have to worry about replacing the motor with one that's suited to pull a stiffer spring?
I'm going to have full-auto removed at purchase, so once I get it I'll only have Safe & Semi. Can I run a lipo, shooting only semi, without a mosfet? (I don't know what a mosfet is but I've heard that they are
recommended, not
required for a lipo setup) I'm looking to get 400 fps, with insane trigger response (The most I can have is 440 fps, my field has two kinds of DMR's... Class 1 & Class 2 - Class 1 = 440fps, standard MED, Hi-caps allowed, and Class 2 = 480 fps, 75ft MED, Std. mags OR Mid-caps with field official permission). I don't want to have 480 fps, because I'd feel like a newb for carrying a lasergun, also, 75ft engagement distance sucks.