You're welcome. Yes, quite a fun one. Bit of a NY ethnic theme again.
I appreciate clues with a smooth surface read, even if they're not all that tricky.
* A - 10, 19, 29, 46. D - 7, 10, 13, 32, 39.
I've found graph paper handy for this type of puzzle. Write the normal answer with the known coded letters below or above, as you work back & forth.
Re computers:
A long time 39D, I wrote a little spreadsheet for cryptograms. As you find a letter it is placed under the coded one & deleted from the list of available letters.
It doesn't solve the puzzle, of course; that would spoil the fun. Just an electronic pencil, & eraser if you need to make changes.
Will have to resurrect it. It would work well here.
Re ads: just got blasted with a full-page one for dog food.
Seriously considering moving all this to AnswerBank.