My question is simple: Brandon has said that Vasher has hacked Stormlight to make it work like breath to sustain him in Roshar. I presume he has a reasonable amount of breath so that he wouldn't die immediately without stormlight, but does he lose breaths every midpeace and weeping since they last long enough that every sphere and gemstone is done unless it's huge? Or does he have huge gems hidden for exactly this reason?