Thank you, Les & AB, for all the work.
DNF this time. Had HOUSE instead of TOOTH for 39A & didn't get 47A, duh, so that messed up a couple of Downs.
Best of the lot AB's 11D (my maths & computer background).
Other favourites: (L) 17A, (I) 6D, (K) 8D, but plenty of good ones.