Hi Tony
I got them back up after about an hour of messing - not sure how but did.
If I change the const CHUNK_LENGTH = 10000; as you advised to fix membership issue then it would not re-cache... I had to set it back to 100 and it then did re-cache.
I am going to build the dev on another machine this weekend locally in house and not have it on the same server as the live.....
I will update you in the help center
Dont worry my next post is only for how to not a moan