The jury's out on the issue of local KiX executables and DLLs. My understanding is that Wintendo has a lousy redirector and having local copies may improve matters. I know it is a bit more work to maintain up-to-date local copies but it is something you will probably have to test for yourself and decide.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.