??? I thought water couldn't reach 212 at higher elevations, that it would just boil first.
Also, re windscreens, I have always heard that you weren't suppose to use them with butane cannisters, though I always try to cheat a bit by putting it next to a rock to reflect back some heat.
As for a tight fitting lid, that does seem to be a problem of Al pots vs Ti, since they are easier to get bent out of shape and hence may not make as a good a seal.