Logic Masters Deutschland e.V.

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

This puzzle explores a new constraint called 'screws'.
Many thanks to Chameleon for creating the software to make actual movable screws!
Do have a go and please leave a comment if you enjoy. :)

Recommended:

Solve in PuzzleTV (movable screws)

Also available:

CTC (with background image)
CTC (no background image)
F-puzzles

Screws example

Rules:

• Normal sudoku rules apply.
  
• Digits on a screw must appear in that exact arrangement, but screws may have to be screwed down a number of rows to a max of when the screw cannot go further. Digits on the screw will move along with the screw like a helix every row it is screwed down.
  
• Cells separated by a knight's move cannot contain the same digit.