Recently Purchased a Ruixin Pro Knife Sharpener. While putting it together I noticed the guide parts had a lot of slack to them and while using it this caused a lot of noise and I had trouble keeping the angle exactly.

I designed these to be exact copies of the existing parts, just without the slack of the originals. These have actually ended up being better as they allow a much wider swing of the stone from left to right, so for bigger knifes its not so tricky to setup.