Any movement would damage the sound so I am not surprised you can hear an improvment.
Meridian go to alot of trouble to have all the sound coming out of the Cone, not the box. Also positive cone damping exotic case materials etc. If the cone is not stable, you have a major problem.
You now have them as they should be, well done. Enjoy, Chris smile

No 18 in the Hall of fame smile I have simple tastes; I am content to settle for the best:
GIK monster bass panels, rear wall. QNAP TVS 471i3. Roon into DSP5200SE via 210/ 218 zone... Explorer 2. Bluesound Pulse 2, Mini & Flex. 596v1, 518, Foxsat HD, Sony BDP, Pioneer 5090, 2 Chromecast's for LRB videos. MS200 to F80 for a Roon zone