Logic Masters Deutschland e.V.

This is my second puzzle, made using the same ruleset as my first.
This one is a bit more difficult, but I think the logic is much more interesting :)
Good luck and have fun!

Rules:
Normal sudoku rules apply: place the digits 1-9 once each in every row, column, and box

Each line must be either of the following:
1) Renban - digits on the line form a set of consecutive digits in any order, without repeats
2) German whisper - digits that are adjacent on the line have a difference of at least 5

Black dots indicate *ALL* pairs of adjacent cells with digits in a 1:2 ratio