Downside to tapped single

[Helmholtz]

Hmmm… perhaps a nonferrous stainless is the way to go, then.

Any stainless steel contains iron, so is ferrous (Latin ferrum =iron). But there are magnetic and non-magnetic stainless steels.
If you can find a non-magnetic stainless bridge plate (as suggested above) that would be the way to go for me.

[SoulFetish]

Oh right “Fe”