As always I'm a bit behind. I've a full grid and have numbered the cells form 1 to 40. My problem is that the preamble refers to 24 fully checked answers but I can find only 20. 5 in each quarter. I hope it won't give too much away but the ones I have in the N-W quarter are 16 across and 2, 3, 4 and 12 down. Given the symmetry of the grid a pointer in the right direction would help me with the other sections.