I should have added a pic. I was talking about the metal supports that don't go through the PCB. The RK097 pot has 2 (bottom left unit), the 2 other through-hole supports are grounded:

https://ae01.alicdn.com/kf/Sd244b8c1...4ef397562P.jpg


I know the switch will be secured, but I can't leave a support "rub" against traces. A metal burr could potentially cut through the epoxy protective layer.

It's just easier to avoid tracing through that area, than have to deal with some "freak untraceable ground" on a trace.

I try to plan so that any student/intern could assemble these without requiring keen observational skills.