Helimutt,
You're in a minority there. I get loads of unprompted compliments on the colour scheme (metallic blue and yellow - Astro scheme). But - each to their own!
But, back to the thread...
No ground damage outside flying time was possible. My machine is kept in my own locked hangar. No kids, no sharp objects, no opportunity for malicious damage or accidents.
Thanks to everyone for the suggestions - keep them coming. I'll take another look at the alternator pulley tonight. I've torquesealed marks to the ring gear and rotated it carefully to make sure every single tooth is OK, but I'll treble check the alternator pulley.