Originally Posted by ultraman6970

From what I have noticed the new UT cups are way more forgiving if the shell is not super perfect, but is always good to do it. If your previous crankset did not give you any problem i dont see why to do it now. Always u can do it later.

As for the shims, well. The last cups editions looks like are tiny wider, i dont know if anybody noticed, they even changed the color to a brownish/greyiish mix.