and what do you use? considering a few options - bulk leucine only (really cheap) bulk bcaa powder (still pretty cheap, like $20 for half a kilo, 2:1:1) commercial product like xtend, all-in-one, or purple wraath. more expensive but flavored and most of them contain other things as well. and finally, a completely custom mixture ( http://customnutritionwarehouse.com/product_info.php?products_id=1030 ) this is a cool idea, but i have no idea how i would configure it, and you have to buy a kilo. suggestions?