I've solved everything except 44A. I fear it's super simple but I just can't see it. I know the corrected letter but not where to put it. I know the 4 crossing grid entries and how this one must be "treated".
All done. Great puzzle. My only concern is what the “on” is doing in 10d, “mounted fighters , better on roans jeered”. If we correct “better”, does the (treated) clue not work fine without the “on”?