Needed a sturdy mount for the portable accelerometer. A weak mount will affect the measurement and beeswax is also not an option :)

I am running the printer on marlin but made a simple klipper setup just with the x,y,z motion to measure the resonance. To verify the values found with the manual test print.
Now I just swap sd cards between marlin and klipper motion when I need to retune.

Configuration: https://github.com/FYSETC/FYSETC-PortableInputShaper 

Uploaded also the klipper config files rename them to .cfg 

Parts:
-accelerometer
-2x M3x12mm bolt
-2x M3 nut
-M3 bolt long (delivered with the PortableInputShaper)

It seems that marlin is improving the input shaping feature: https://marlinfw.org/docs/gcode/M493.html 

Check also my other designs: https://www.printables.com/social/201278-hans/models