Diagonal Sudoku Puzzles (Fun With Sudoku #353, #354)

Diagonal Sudoku is one of my favorite Sudoku types. Rule of unique numbers falling on the main diagonals makes Diagonal Sudoku very interesting Sudoku type. 
These two Diagonal Sudoku puzzles are very interesting. The theme of the first Diagonal Sudoku puzzle is the pentomino letter W and for the second Diagonal Sudoku, I tried to create the pentomino letter F. However at the end, I was forced to add few digits in the center which broke the theme. However, both of these Diagonal Sudoku puzzles have very interesting solutions and I am posting these puzzles in the Fun With Sudoku Series as 353rd and 354th Sudoku Puzzles in this Series. Can you solve these tough Diagonal Sudoku puzzles?

Rules of Diagonal Sudoku Puzzle

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the rows, columns, outlined 3x3 box, and two main marked diagonals.

Diagonal Sudoku Puzzle (Fun With Sudoku #353)

Answers to these Diagonal Sudoku puzzles can be viewed by clicking on the buttons below. Please do give your best try to solve these Sudoku puzzles before looking at the answer.

Diagonal Sudoku Puzzle (Fun With Sudoku #353) Answer

Diagonal Sudoku Puzzle (Fun With Sudoku #354)

Diagonal Sudoku Puzzle (Fun With Sudoku #354) Answer

These two Diagonal Sudoku Puzzles I am publishing as #353rd and #354th Sudoku puzzles in the Fun With Sudoku Series. Here are the next are previous Sudoku puzzles published in this series.

The previous Sudoku Puzzle is Kropki Sudoku Puzzle (Fun With Sudoku #352)

The next Sudoku Puzzle is Anti-Diagonal Sudoku (Fun With Sudoku #1)