Solutions to Tuesday's extra Words within Word Sudoku puzzles

I gave you 13 interactive Word Sudoku puzzles Tuesday, all but the last two using four of the five letters in the words NW SPA. The last two puzzles used ALL the letters, forming anagrams of NW SPA.

4-letter words:
1. NW SPA –N: PAWS
2. NW SPA –N: SWAP
3. NW SPA –N: WASP
4. NW SPA –P: AWNS
5. NW SPA –P: SAWN
6. NW SPA –P: SWAN
7. NW SPA –S: PAWN
8. NW SPA –W: NAPS
9. NW SPA –W: PANS
10. NW SPA –W: SNAP
11. NW SPA –W: SPAN

5-letter anagrams:
12. NW SPA: PAWNS
13. NW SPA: SPAWN

Please let me know what you think of (1) this "Word within Word" variant of Word Sudoku; and (2) the interactive puzzles. Comment on this post.

Thanks,
--Dave