Hi Tim, Yup, That was the one, the block drain, the 2 new ones I bought both seem to leak at the point of sensible tightening. Gripped the wing nuts on both sides with a large set of pliers and tightened them up 5 - 10 degrees beyond hand tight, did the trick with no breakages. Thanks for the info on the paint, that engine is looking superb!
I nonchalantly mentioned I was going to pop the young blokes axle swivels in the oven to get the oil out one Sunday afternoon recently. The reaction from the chief oven controller seemed quite emotive, I got the impression it wasn't the best idea I had that day....
So I did it on Monday!!

