Thank you for the info, I read a similar post before (probably from you) but that still leaves me confused which generator to buy. Why does Silver Gen use only .999 where most others like Sota, RSG2, SilverPuppy etc use .9999. I want to buy SilverGen but would prefer .9999. Their generator is more expensive than SilverPuppy, you would think the silver should be of at least equal quality.