Isn't that everyone's dream job? Only have to pump out one new design every decade but it has to be good enough to last at least a circa 50 year product life cycle... the longevity of the Trangia stove and company is a real testament to a truly excellent design.
100% agreed. Trangias are easily my most-used stoves, probably 10x all the rest combined. A Trangia that's 50 years old will function 100% as good as it did when new.
NB the source of my modified spout musings was a fairly recent post by Spiritburner where he modded the spout in his new HA 27-<even number> set/ 27K in old-speak I merely wondered if Trangia should adopt (and then wondered if a 27K needs the 2nd pot anyway..)