I've only ever used evens lengths. 1mm really isn't going to make any difference - as long as the spoke isn't 1mm too long.
I'll probably get cast out as a heretic for saying this, but I much prefer good ali nipples to brass ones. I've never had any problems with Sapim Polyax alloy nipples (apart from one which broke after having been marinaded in latex/ammonia sealant for several years), and I've had quite a few problems with brass nipples binding, breaking and releasing suddenly for no reason. My default choice is 14mm Polyax alloy nipples.
I've only ever used evens lengths. 1mm really isn't going to make any difference - as long as the spoke isn't 1mm too long.
I'll probably get cast out as a heretic for saying this, but I much prefer good ali nipples to brass ones. I've never had any problems with Sapim Polyax alloy nipples (apart from one which broke after having been marinaded in latex/ammonia sealant for several years), and I've had quite a few problems with brass nipples binding, breaking and releasing suddenly for no reason. My default choice is 14mm Polyax alloy nipples.