Modular Shhhhtaples: Is this Sudoku or a spy mystery?

Today's Video:

What more can I possible add to a puzzle rated at 97%? If you get stuck have a look at the first 10 mins of the video, you'll breeze through this!

Link to Play:

Modular Shhhhtaples by FullDeck and Missing a Few Cards https://tinyurl.com/SudokuSleuthModularShhhhtaples

Rules

Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box.

Ratio Dots: Digits separated by a black dot are in a 1:2 ratio. Not all possible dots are necessarily shown.

All lines in this puzzles are BOTH German Whisper AND Modular Lines.

German Whispers: Adjacent digits along a German Whispers line must differ by at least five.

Modular lines: Any set of three adjacent digits along a modular line has three different remainders when divided by 3.