Static buzzing on early St.Vincent trem arm only.

Hello all,
I have a new issue with my trem arm. I am now getting a static sound when using it. I have modified the guitar quite some time ago regarding electronics and have not had the problem.
I can manipulate the trem via the bridge and I get absolutely no static.

I realize it is a ground issue somewhere. I have addressed my claw and inside the guitar (pots etc. )

I can’t figure out why it’s only the arm. I have tightened it and it still has the issue.

Thanks