Looking as a set of SPS-410 I see no sign that the tweeters are movable. They seem just as fixed as the SPS-400.
On dimensions - the tweeters on the SPS-410 protrude 2.6mm from the mounting surface than the 400's. Is this likely to be an issue?
SPS-410

and SPS-400
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X3 3.0d 2006 (MY07)
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