Oh dear - we are all grateful to Norah's efforts but I was so happy with the previous set-up.
Here I have finished the grid bu am hopelessly stuck and want to get to the next level. I can find sufficient misprints. I have identified them in the following across clues : 7,11, 14, 18, 27, and 39 (and probably 29 and 35 but can't identify the incorrect letter here) and the following downs: 2, 4, 7, 19, 21 (probably 9, 26 and 30 ditto on incorrect letter)
Where and who can I turn to for help? Is it this thread? Please help - it's a long week ahead.