Recent came across these: https://www.nizkeyboard.com/product/2019-new-niz-ec-switch/
They caught my attention as a possible new source of sliders to make Topre boards MX compatible! The price was not too high so I decided to order a set to try out!
I got them in this morning so I decided to throw them into a Realforce 23u and see how well the perform and compare to stock. For anyone who may be interested, the Niz housings themselves are NOT 100% interchangeable with stock Topre, they clip in well, but move side to side because they are slightly smaller.
the sliders installed easily into the Realforce housings. Because they are slightly smaller in outer diameter, they have slightly more wobble. The material of the Niz sliders is significantly smoother than stock, they feel better/smoother to me.
I installed GMK keycaps onto the sliders and the results were… not perfect. There are definitely alignment issues similar to the KBD MX sliders that came out last year. They don’t seem as bad to me, but it is still noticeable when photographed top down.
I modified the enter slider housings by drilling it so I could mount an MX enter key, and then put everything back together and installed MDA Big Bone keycaps to see how it would all work out.
When it is fully assembled, it looks okay to me! You can see some of the misalignment but isn’t too noticable. Overall they sliders feel smoother than stock to me, and actuate well. They do have slightly more wobble and some alignment issues; definitely a bit of give in take.
(image album: https://imgur.com/a/Xn5SrBe)