Purchased one of these from AliExpress which is frustratingly flawed. The tabs on the three armed ring, just below the burner, are all bent downward where they're supposed to make the vertical turn to hold the pivot to which the pot support arms are attached, completely screwing up the pot support geometry. As result, the pot supports contact the underside of the pot only at their innermost points; the serrated edges extending radially are all bent downward, and hence completely useless.
There's no way this was shipping damage, as the package arrived in good shape, and all three arms are bent--there's no force that could have bent them all, without also crushing the burner assembly
Amazingly cynical behavior on the part of the manufacturer, to ship something this defective.
It's too bad, because otherwise this looks like an excellent, or even an amazing, stove.
The only other potential glitch is that the underside of the block which houses the valve contacts the one canister I tried just about when the inner o-ring is being compressed, limiting further tightening. So if the distance from the top flange of the fuel canister to the inner o-ring seat at the bottom of its well is not precisely controlled, one could get an incomplete seal. On the other hand, if that parameter is well-controlled, the contact is probably a good conduction path for some heat from the burner to reach the canister.
Have managed to separate the damaged ring, and will attempt to re-flatten it, perhaps in a vice.
Does anyone have any suggestions for cold-working titanium?