Here you can see how to mount various handles etc
Click on a link and watch the videos.

Installation of wooden inserts:
https://www.youtube.com/watch?v=43mCd7Y3drc

Installation of Torpedo handle:
https://www.youtube.com/watch?v=OieKdtNKPRI

Installation of Skodsborg grip:
https://www.youtube.com/watch?v=7KxjmmuGY9s