[Closed] Match rotation of mirrored bone?

Hey guys,

I’m trying to fix some old rigs that are the wrong scale, and have several chains with bones with negative scale.

I have most of that corrected, but I’m having issues matching one of the bones that’s source has a scale of [-1,-1,-1]. So basically my rotations are way off. If i multiply the rotation by a scaleMatrix of [-1,-1,-1], it gets everything pretty close, but not precise…This could just be a coincidence as my matrix knowledge is meh.

Has anyone done this before, or can point me in the right direction? Thanks