Axis SS Piezo Trem adjustment

Hi Folks, I just picked up my 2nd SS Piezo today from the local guitar shoe, I couldn’t resist as its the only one One seems for sale in years since I got my first one.

Anyhow, I notice that the tremolo mechanism is a bit sticky, its sort of hard to use it lightly whereas my older guitar is really easy to use, I took the cover plate off the back and there are 3 springs, removed a spring but not cured, its feels like its stuck to the body of the guitar and I have to put a lot of pressure on it to get hot moving, Ive over egged it a bit but thats the kind of feeling it is.

Any clues?