CNCFusion mentioned in a thread that their "Deluxe" kit had "Preloaded" ballnuts. How can a SINGLE ballnut be preloaded? I was under the impression that you needed two ballnuts, with something between them to keep the tension (see pic below). Are they just referring to using oversized balls?

Oh, and NOOK said that they can add these oversized balls at the factory for an extra $35 per ballnut. They said this reduces backlash to from .01 to .003. I think I'm going to have to get the $40 SBN series ballnut, because all other options are $300+ :-O I'm planning on doing some sort of DIY preload using dual ballnuts (ala Cadmonkey) and something between them (at least on the X, and maybe the Y).