It tastes sooo much worse when you add an acid. Its not really necessary either
3x3 is the standard time but many do much less. The strongest brew i've had was brewed 4x3 so who knows how much more is still in there. What you put into it reflects what you get out of it though. If you don't like brewing it all in one day then try breaking it up and maybe doing a boil each day, and leaving materials in the fridge each night
oh and i should add that when i did the 4x3 brew i broke the brewing up like i described, and so the vine soaking overnight may also have contributed to the increased potency
<Ringworm>hehehe, it's all fun and games till someone loses an "I"