Which VTF Scale are you using?

Audite84 and vassilis, I hate to tell you this but the same scale is available on Amazon for $40.00 under the "HiFi Guy" name. The Chinese do this all the time. They design a gauge for Ortofon then either sell it to other people like Jelco or sell it themselves undercutting the price substantially. You have wandered into a perfect example. This scale also shares a lot in common with the Riverstone gauge. It would not surprise me if the internal mechanism is the same. The Pro-Ject is another example. Ortofon might tell you that theirs is "selected" for better tolerances which is doubtful. I have an Ortofon DS-1 which I am sure I overpaid for. It only reads down to 10ths which is also not good enough for the Gizmo.

The 49 dollar one available on music direct. Not sure of branding, but it works well. Have the shure scale, but put away....

I have an old Bib mechanical gauge and an unbranded electronic gauge. Both work quite well.

I use the Audio Additives Stylus Force Gauge.  Relatively inexpensive, extremely  accurate and easy to use.  I also still have and will never part with my old trusty Shure SFG-2 that I bought in the 70s.  It's old school (i.e. not digital; all counterbalance mechanical), reasonably accurate and will never fail.  I keep it on hand in case the digital conks out and I have to order a new one. 

I have an Acoustech digital scale that was on sale for $30.00 regularly $50 from Music Direct.  I still have my trusty Shure I bought in the early 70’s.