Which DFG do you use?

I have one that gives a different reading each time i drop the stylus on it.
Do that 10 times i get 10 different readings. This is NOT a Taiwan/China made gauge by the way. This is no doubt a serious flaw in the electronics, the design or concept of said gauge.

Do you or did you experience the same issue with yours?
What DFG would you recommend that provide rock steady readings?
Thanks