thebuttonmushroom: I think it's time to call it a day on this one. Shortly after being replaced the cache disappeared again - all I found was the lid. Very close nearby there is construction work underway and I can't help but feel that this cache will be unsafe to remain here, even if it's replaced again.
Due to a puzzle that constantly needs updating and a logging method that cannot be enforced, I've decided now to focus my energies on creating new caches elsewhere and freeing up the area for others to use. [:)]
Thanks to all those who found it, and especially those who signed the log as intended - I hope you enjoyed doing this one!