I think I may have seen the thread you're referring a while back, a random search took me there. Some very good restoration and loads of pictures. I'll have a look for it again.

... Still can't believe it. Went in for a standard check up and they found this!! I'm very lucky in one respect. The strangest thing is I've had both rear wheels off recently had a good look around but didn't see it. I think because I was looking from the top down. Having a car on ramps really can make a difference.