Hi Jorge,
just to give a follow up,
After running ddrescue since late December I got to 99.95% recovery and then gave up as rate of recovery had slowed down to like .01% per week.
I've now started a new config and my array has started up successfully. I'm not sure whats missing and I'm not too fussed. Very happy to have most of the array back online.
thanks so much for your assistance.
Stanko