Pressure bar on upright piano

[Elian Degen J.]

Hello

I just received an old Upright Rippen piano which for some time was subjeced
to a very high degree of humidity.

Most of the job is done alredy, but now it came to my attention that the
pressure bar has lost pressure as some strings will just move freely
sideways. I tried tightening it a little bit ( tuning is lower in excess of
150cts...) and it tightens easy, so I tried half turn per screw evenly
across the whole pressure bar, Now when I strech strings stay in place.

My question is,  should I leave it there?  Shall I tighten it further? How
can I determine an optimal setting? or near it?

Thank you