Knock sensor on smaller surface than 22mm

Hi

I want to run my plex in parallel with my ecu knock control got calibration reason.

On my engine I do use the two original knock sensor bungs for the ecu sensors

For plex knock sensor I want to use two other bungs I found on my engine

Unfortunately those do have only a diameter of 15mm.

22mm is required for a knock sensor...

Would the less surface make a big difference? Anyone who tried it and had still good results?

Thanks a lot

I say try it and see. I think it will work fine.