Thank you very much loge! Impressive!
I don't have anything against splitting numbers. 20d was one of my first-one-in and I didn't mind the reversal either. But substituting numbers with other numeral vocabulary... I'm not too happy about that.
Re 9a, my interpretation of "case" was the exact opposite. I would have never guessed. And I've just learnt a new meaning of "crop".
As for 17,14,8 : I'm still parsing it, struggling with the numerical references and the extended anagram (I've only just read this morning's posts). But how misleading that the longer of the two neighbours ends up being the shorter in the grid!