Many thanks for the kind comments chaps - the # 28 I actually took in trade along with a # 34 & # 38 from a customer last year, all raw, and had Matt redo the #28 & # 38 (they had spine tape) - I'm rather pleased with them.
The # 31 I bought rather impulsively from CC last year after seeing it at the London Con, after I kept getting outbid on a 4.0 MP copy they had in their auction, which ended up selling for over $15K, less than a $1K cheaper than this 7.5 - I put it up in the Want to trade forum last year to see if anyone wanted to trade me a lower grade copy, but I guess no-one wanted to part with a low grade one.