Silverback MDR-X

That's exciting, a ground up AEG would be pretty cool, especially from a company like Silverback who seem to take a long time making a good gun.
This may be like a modern PTW in some ways, which would be pretty cool.

As for GBBs, I have little experience besides an SSP1 I killed and some guns I have borrowed at games so I'm not really an expert, but they don't seem super awesome to me. Having eclipsed the cost on my SSX23 in magazines for it I see little excitement when thinking about needing to buy a whole loadout of $40-90 magazines that weigh an absolute ton, especially when you consider how delicate they are(having broken 2 MK23 mags beyond repair). GBB is definitely cool, but I think it's safe to say than anybody with a GBBR and a lick of sense also owns and brings a well functioning AEG or other primary in the medium likelihood that something goes wrong with the GBB.

My main gun right now is pretty major, as the trigger is very short and has no take-up or over travel, and in the FCU my nozzle and poppet dwell settings are set to be as fast as possible. I feel completely adequate with semi only, as I'm able to get sort of a burst going at like 45 RPS, but I'm able to pull off single shots with ease.

This would definitely be considered speedsoft, except that it's very long and unassuming.
Don't pay mind to the pose, the camera guy told me to do a "heroic" pose, I don't actually look like this when I play.

1Tonne, if anybody is to get a free or discounted gun from Silverback, it would be you. I think that it would be worth emailing them and explaining the stuff you would like to try with it and the long write up to follow. I'd also email ICS to get ahold of their sniper too, for the same reasons.

Yeah, idk how likely you'd be to get the stuff, but it's worth a try. I'd say that it's a forum where people go to get actual information, not just a bunch of knob jockeys on Reddit or FB, and you may save them time in troubleshooting.

I got a free barrel and buckings from DaVinci for the price of shipping, and if I liked it I was asked to mention it now and again where it was relevant to do so. I've gotten free shit from some guys on Amazon as well, a handful of red dots and flashlights, and I review them, but don't exaggerate and I tell their exact purpose and use, not telling people they should put a $40 dot on a real gun they will trust their life to.

I've also had literal dozens of people wanting to bum a tank, barrel, R-hop, lapping service, or other part I make off me, and it's annoying as hell. They will usually say for "testing", which is retarded as I wouldn't be selling the thing if I hadn't figured everything out already.

Anyways, worth a crack, you never know.

Man, that brings back some memories looking at that thread, back when I was making some bullpup VSR with a homemade HPA engine and basing everything off of now classic Novritsch videos.

For which chamber is better, I am a fan of pivoting arms as they are easy to make stable, while vertical nubs tend to be looser. This was the case with my Airsoft Philosopher chamber, the nub was just too wobbly and would not keep still. Eventually I "invented" the SS-nub and made one for it, which made it lot better. I still preferred the AA, but it showed that a vertical nub could be rather good.
I haven't tried the TTI as I don't have a VSR anymore and feel no need to get another, but I'll trust your judgement that it's a solid choice. Still, I think that the AA with my SS-nub or a Masada arm is easily one of the best chambers out there, and will be for some time to come.

Well there's J or joules, and there's J/CM3, which is basically how densely the energy is dumped, or sort of how much the impact will hurt. Heavier BBs at the same joules will have a higher J/CM3, and therefore hurt more, plus their improved ballistic coefficient which lets them not lose as much energy due to wind resistance, which also makes them hurt more.

Joule creep is pretty much just your gun being more optimized for a heavier BB than a lighter one, so for example you'll shoot a .20g at 2J and a .48g will then shoot 3J. It doesn't really matter in the technical side of things, as that means you should be using that more optimal BB, or you should change that so a lighter BB is more optimal, depending on the situation. Joule creep only really matters when a field chronos in FPS or with a light BB like .30g, and then when people switch to the BBs they play with, and gain a good bit of power which will then hurt a lot more. This is especially important with HPA guns, gas guns, and some spring snipers, as you are much more likely to see significant joule creep in them.
Not that big of a deal, but you should know what you are dealing with as to not hurt somebody or get banned from the field.