yeah, you don't absolutely NEED them, but they do help in keeping everything cleaned up and well connected. not to mention they look good too; better than what i've got atm atleast.
for the amount of money spent on buying terminal rings, you could have just bought a battery terminal like the one on the first page and saved you all the hassle.//content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif