Did this end up working? It's not ideal to have to go through so many hops just to get a 17 kernel but there doesn't seem to be anything else available yet.
Sorry I only found that link after getting to .21 the long way. I can confirm it works. Had to flash the full .11 US fully rooted stock ROM, then the .17 zip, then finally the .21 zip. Just wiped cache and dalvik. Made a nandroid of the stock.21 just in case another ota comes out. Then back to guevor test15 for me. It's been working great ever since. Good luck.
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