The Rikskeff model helped me a lot to improve my knife sharpening results.

However, I missed a few things so I made the following changes/extensions:

• 15° grinding angle for even sharper results.(The angle applies to blades with a width of approx. 80mm)
• Angled ends to avoid contact with the whetstone.
• Narrower versions for thin blades.
• Double-sided design so that the guide does not have to be constantly repositioned.
• Further design to be able to sharpen slim blades (The angle applies to blades with a width of approx. 18mm)

Have fun trying.