Just checked wheel bolts for tightness after they were off the other day, the o/s needed an extra 1/4 turn to get them to 120nm which they were at on Monday so they've slackened off a tiny bit. The n/s was fine.
I'm popping up to see Matt at OCD tomorrow with my standard front struts to try on instead of the air lift ones to see if they're responsible for the knocking.
I'm also debating upgrading to performance struts anyway