$615???
That's the dealer for you. Now go have them replace your brakes and see how much $$$ they charge.
It's much, much cheaper to do it yourself obviously. Usually wheel bearing replacements are a simple DIY, no? ...although I've never done one on a Porsche...
I have also heard of owners that have had wheel wobble issues with non-hubcentric spacers. You definitely want to be hubcentric. Not only does the hub need to be concentric with the spacer, but the spacer needs to be concentric with the wheel...thus making all 3 components concentric.
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