While I am not sure on the thread you are after, I can help you out with looking for it.
The search function is limited when looking for 3 character or less words - i.e. S13. What you can do to get around this is use google advanced search and search only the forum. Combine it with the other words you want (use the & function to ensure you get the right hits) and you should get a far detailed search rather than every random post that mentions RA60 or S13.
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