The inversion of values in mirror_setup in RBF_manager does not seem to work in mGear 4.1.0 and later, and the same is true for RBF2.0. I have checked and it seems to work correctly up to mGear 4.0.9.
I checked by running RBF_Mirror on the same scene with different versions of mGear.
Maybe there is another cause, but I will report it.
Thanks again for letting me use mGear.