I have this question with flex.
I rigged a mouth, for this time I stepped away from bones (different approach than I am use to) and tried it with flex & meta effectors, everything works great, deformations and such are well controlled..
but there must be one thing I am missing .. when I rotate the entire rig the flexcurve does some strange things (probably some settings that I'm missing)
I then activated those tangents .. but it changes the curve also..
Anyone that is familiar with this, cares to inlight me ?
much thanks N @vance