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?
VW Touareg V6 TDI 4Motion
X3 3.0d 2006 (MY07) being sold