Instead of rinsing with all that water, I usually use a bowl of iced water (LOTS of ice) which I dump the noodles into after draining them. I swirl the noodles in this super-cold water until they are very very cold and then drain and squeeze them out. This seems to work fine. also, the more hot sauce, the better! I like to put a lot of very spicy radish kimchee on my naengmyun. I actually have a much simpler recipe that tastes great and is spiced up in a way that you don't have to add any hot pepper sauce. I learned from my mama, so I can't divulge her secrets!