Logic Masters Deutschland e.V.

Previous Dutch Flat Mate Puzzles
This has been a weekly series since '18 Oct 23'. Here is a spreadsheet link for all the previous puzzles in the series, which also has a few teasers for upcoming constraints/guest setters in the series (subject to change).
This alternative link offers a limited LMD search for Dutch Flat Mates.

A big thank you to Flinty for letting me join his wonderful series!
I invented the German Sums constraint a few weeks ago. You can try my original puzzle here.

To play the puzzle, please click the image:

Puzzle Link: Click Here

Initial Setter Difficulty: 3 / 5

Normal Sudoku rules apply
Place the digits 1-9 so that they do not repeat in any row, column, or 3x3 box.

Dutch Flats
Every 5 in the grid must have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.

German Sums
A clue outside the grid gives the sum of all continuously adjacent digits with a difference of at least 5 up to (and not including) the first digit with a difference of 4 or less in that row or column from the direction of the clue. A digit in the first cell is always included in the sum.
For example, if row 4 is 728315469, then the sum would be 20 (7+2+8+3) from the left side and 9 from the right side.

German Sums Explanation:

Basically, you can imagine that you are drawing a German whisper line starting in the first cell next to the clue and ending in the last cell with the valid digit fulfilling German whisper line properties (adjacent digits have a difference of at least 5), and the sum of the digits on that German whisper line must be equal to the given total.

Hint to start

27 clue combined with DFM gives some interesting outcome.

Host Setter
Next week Flinty will check if 5 likes 8!

If you liked this puzzle, I recommend trying out my other puzzles:

The Erica Series:
★☆☆☆☆: 1, 2, 4, 5, 6, 12, 15, 17, 23, 26, 27, 31, 32, 46, 47
★★☆☆☆: 3, 7, 8, 10, 11, 13, 14, 16, 18, 20, 24, 25, 29, 30, 34, 35, 38, 40, 42, 45
★★★☆☆: 9, 19, 21, 22, 28, 33, 37, 38, 41, 44, 45
★★★★☆: 36, 39, 43

German Sums Series:
★★☆☆☆: 1, 3
★★★☆☆: 2

Shading/Ying-Yang:
★★☆☆☆: Pretty Odd Shaded Area
★★★☆☆: (+5)-Yang, Negative 8 YY
★★★★☆: Aim High! (YY)
★★★★★: Why-Why?

Modifiers:
★☆☆☆☆: Borrower
★★★☆☆: Modified Flat Mates, Neighbourhood Watch
★★★★★: Mad Delirium Puzzle: Remarkably Beyond Crazy [16x16]

Fog of War:
★☆☆☆☆: Erica 12, Erica 17
★★☆☆☆: It's What You Do in the Dark That Puts You in the Light, Find It All, What the Fog?, Erica 20, Erica 29
★★★☆☆: Broken Flashlight in the Dark

Pencil Puzzle/Sudoku Hybrid:
★★☆☆☆: Masyu (Short) Sudoku, Heyawake Sudoku (Given Regions), Way Too Hot, Are You? [Hotaru Beam]
★★★☆☆: Tetromino Sudoku
★★★★☆: Made in the Shade (Heyawake CC)
★★★★★: Heyawake Sudoku

Pairometers:
★★☆☆☆: Pairometers (6x6 Pack 1), Pairometers
★★★☆☆: Pairometers (6x6 Pack 2), Pairometers (6x6 Pack 3)

Various Puzzles:
★☆☆☆☆: Blown Fuses in Electrical Installation, Let Me Introduce Myself, French Wrench, GAS Regional Constraints, Quadsumes, Snack Latin Arrows, Sarah
★★☆☆☆: Symmetrical Fan, Night Club, Important Hour on the Clock, What Was the Sum Again?, Disgroup Joints, 10-Arrows, Antiking Dutch Skyscrapers, (Not so) Little Killers, Indexing Sword, Larna's HoneyMoon
★★★☆☆: Cops & Robbers, Positive Symmetry, Doppelgänger Killer 1-25, Region Whisper Line, Christmas Chaos
★★★★☆: Liars. Liars Everywhere., Sandwiched XV Squishmates, Fireworks 2025, (Yin)German Pairrows, Little Galaxy, 2x Solution
★★★★★: Any NEWS?, Potentially Pointer, Possibly Parity Party