This really, really needs to be stickied. I bought a set of Rays nuts for (oh the irony) my ITR AKA Dean's old car. Unbolted the existing nuts, went to open the package and noticed the difference. Did some quick research and sent a message off to the supplier. Then did some more searching and found this thread.
Edit: Found this link - wonder if it's worth testing?
http://www.kseriesparts.com/cr/SSR-WHEELWASHER.html
Washers that change the taper from slant to ball.
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