Murky @38, re 9d I'd be grateful if you could enlighten me on that one or even let me know if it has an O or L in it!
Apart from that, I'm done. Considering how early on I got the second of the titles (so knew the subject at that point) the rest was still a slow process until the penny dropped. My standard quibble was using i or i' for in which held me up for a while, otherwise enjoyed the clues and topic. Chambers got a good workout.
It's funny that Chambers is the prize...I don't think it could be done if you didn't already have one (or more).