True, but the plugin’s current iteration is so awesome that after my having used it literally thousands of times, I’ve not ever had anything this bad happen with it. Bit of history on how the model was made. The “insets” on the bin were carved using solid tools. That shaping was all done on only 1/4 of the bin, since the uniqueness all resides there and only there. The 1/4 component was then mirrored to make a half, and then those two mirrored to make a whole. After getting the above problem no matter how I tried, I also then also tried rotating a copy of the 1/2 component instead of mirroring. No joy. I tried exploding the whole bin component and regrouping. No joy. I tried making all the geometry firm instead of soft and smooth. I made sure all geometry is on the same tag (formerly known as layers). I even tried rotating the whole component 30 degrees, exploding, making it a group. Same 913 faces, get falsely perceived as reversed.