Theres not a lot to choose between the various hexi/esbit stoves out there, after all they're just a platform to burn the tabs on and a potstand that also acts as a slightly ropey windbreak.
This is why inventive people like the OP mod the hell out of them.
Weight/gauge of metal is the important bit, lighter tend to be thinner and less robust.
Re: Your boil time.
Thats a lot of water, how many tabs are you using? Are they the big 'surplus' ones or the smaller camping shop ones? And how are you arranging them in your burner?
I've recently found out about the DDR issue esbit burners, because their standard pot is tall rather then wide like British mess tins the stove is very compact.... About the size of a fag packet or a deck of cards. Thinking of getting one (from
Here) and
giving it a rattle.
I think the hexi/esbit stove is the perfect backup.
Fairly small and dense package
No moving parts (other then simple hinges)
No jets, tubes or pipes to get blocked
And the fuel lasts for decades (My Dad bought me a burner and a load of packs of tabs when I was a Cub-Scout, a few years ago we used the last of those tabs.)