Maybe it's just me, but if I were to go on a 2000 kms trip in the middle of nowhere where things could go wrong pretty quickly, I'd rather not have some of my main survival items be from AliExpress...
My build is about 40% aliexpress, 40% "adventure kings" (cheap aussie mass retail outlet), and 20% "expensive stuff" from brand-name reputable sellers.
100% of it all is deep-research full-common-sense, not "blind trust" or "cost more must be good" silliness.
100% of the aliexpress things have given no trouble at all (winch/recovery/electronics galore/ LOTS of stuff)
100% of the "kings" things - again - no trouble at all (3000w inverter, lifepo3 360ah batts, pump)
33% of the "expensive stuff" has worked great (big awesome evakool fridge; ironically sauced locally from the factory as a "Second")
66% of it has shat-itself and died: the very expensive solar panels lasted only a few weeks up north, and both the original (never installed it - loose things rattled inside) and replacement the DCDC charger (blew some fuses, then caught fire!) - costing about $500 extra in spoiled food on top.
SO - my experience to-date, when taking as much care as possible, is the opposite to what most people think: you're doing yourself a massive dis-service by assuming that aliexpress is crap and whatever-you-think-is-not-crap is good. The truth is that, if you pay close attention properly, what you *think* is good from "reputable places" is actually vastly more likely to be a scam or s***, and everything *else* actually is good. (so far, touch wood!!!)
The "take care" part is *VERY SIGNIFICANT* - so do not misunderstand what I'm saying. Everywhere, not just aliexpress, is full of bull**** and scams and fine-print. It is highly non-trivial reading all about things, and reviews and reputations etc, and properly understanding how well it's going to suit your needs and work.
This fuel-bladder is an outlier - it's too obscure with no useful reviews, which is how I've ended up wondering about it now!
Amusing how the idea of getting an alum tank in the back never even crossed my mind. The beauty of forums eh? "Been there done that" experience shared for all to benefit from!! So yeah... I'll probably research that idea next (the floor behind seats is 100% unused and waste space right now; we just have some plastic boxes on the seats themselves, that's all.)