I agree about the maintanence free aspect of the Trangia in all its various models, however sometimes I think we all want that little 'extra fast' heat, so I have converted a cheap £7 gas stove to use with my 25, works well.
Every stove needs some maintanence, even if its only knocking out a few dents in a Trangia. You would not leave your car parked up for a few months and expect it to start up and work 100% without looking it over first, same applies to stoves. Common sence really, don't leave them full of petrol/coleman fuel for months, drain them, fire them up at home if they have not been used in a while, check seals and pump leathers, if in doubt, change them. I've got one Primus model 210 made in 1916, which had been in a shed for 40 years when I got hold of it, one new pump leather, clean of the jet, clean parafinn and it worked first fire up. I get a real kick using that stove, its fantastic, so is an ancient Primus 96 (although its small tank means a shortish burn time) which burns like a rocket.
Happy new year to you all, and keep 'em burning