the sugar thing is confusing to me. is the priming sugar i buy at my lhbs dextrose, and is dextrose really just cane sugar? if there bagging up 1 lb for $$, im thinking like alot of ingredients i can find it elsewhere, called something else for$. what about confectionary sugar? its says sugar and cornstarch. i can get dump truck of that for what im paying for priming sugar. any thoughts?