Logic Masters Deutschland e.V.

Hello, enjoy this puzzle!
All feedback and comments will be much appreciated!

Zipper lines with a twist. :)

F-puzzles
CTC

Rules:

• Normal sudoku rules apply.
  
• Lavender lines are zipper loops. Zipper loops have two centers, which are to be deduced. Digits on a loop that are an equal distance away from a center must sum to the digit in that center.
  
• All zipper loop centers are contained in a single cell and must be equal to their row, column or box number (friendly cells).