I can see it's a tour de force but I'm left with many loose ends. Without giving the game away can anyone please tell me:
1. Why the diagonal 'weapon' has to be removed - surely it's its victim who is dropped? (This also contravenes the 'two in a column' instruction.)
2. How to make the first part of the 48ac phrase fit while still giving real words etc?
3. Why I'm left with non-words at 24dn and 34dn?
4. What the cryptic indication of IN is in 46?
Actually any one of these would be good to know.